ICE5QSBG
Quasi-Resonant Controller
Product Highlights
Novel Quasi-resonant operation and proprietary implementation for low EMI
Enhanced Active Burst Mode with selectable entry and exit standby power
Active Burst Mode to reach the lowest standby power <100 mW
Fast startup achieved with cascode configuration
Digital frequency reduction for better overall system efficiency
Robust line protection with input OVP and brownout
Comprehensive protection
Pb-free lead plating, halogen free mold compound, RoHS compliant
PG-DSO-8
Features
Minimum switching frequency difference between low & high
line for higher efficiency & better EMI
Applications
Auxiliary power supply for Home Appliances/white Goods, TV,
PC & Server
Enhanced Active Burst Mode with selectable entry and exit
standby power
Blu-ray player, Set-top box & LCD/LED Monitor
Active Burst Mode to reach the lowest standby power <100 mW
Fast startup achieved with cascode configuration
Digital frequency reduction up to 10 zero crossings
Built-in digital soft start
Cycle-by-cycle peak current limitation
Maximum on/off time limitation to avoid audible noise during
start up and power down
Description
The Quasi-Resonant, ICE5QSBG is the 5
th
generation of quasi-
resonant controller optimized for off-line switch power supply in
cascode configuration. The improved digital frequency reduction
with proprietary novel Quasi-Resonant operation offers lower EMI
and higher efficiency for wide AC range by reducing the switching
frequency difference between low and high line. The enhanced
active burst mode enables flexibility in standby power range
selection. The product has a wide operating range (10~25.5 V) of
IC power supply and lower power consumption. The numerous
protection functions including the robust line protection (both
input OVP and brownout) to support the protections of the power
supply system in failure situations. All of these make the
ICE5QSBG an outstanding controller for Quasi-Resonant flyback
converter in the market.
Robust line protection with input OVP and brownout
Auto restart mode protection for VCC Over Voltage, VCC Under
Voltage, Over load/Open Loop, Output Over Voltage, Over
Temperature
Limited charging current for VCC short to GND
Pb-free lead plating, halogen free mold compound, RoHS
compliant
C
bus
85 ~ 300 VAC
C
VCC
R
STARTUP
R
VCC
D
VCC
D
ZC
R
ZC
Snubber
W
p
D
O1
W
s1
D
O2
W
s2
L
f1
C
O1
L
f2
C
f1
V
O1
D
r1
~D
r4
R
I1
VIN
R
I2
GND
VCC
ZCD
D
Power Management
PWM controller
Current Mode Control
Cycle-by-Cycle
current limitation
Digital Control
Active Burst Mode
W
a
C
O2
C
f2
V
O2
C
ZC
Power
MOSFET
GATE
C
PS
R
ZCD
Gate
Driver
R
b1
SOURCE
R
b2
R
ovs1
# R
ovs3
CS
# R
Sel
R
c1
FB
# Optional
R
Sel
(Burst mode level 2)
R
ovs3
(V
02
feedback)
Zero Crossing
Detection
Protections
ICE5QSBG
Controller
R
CS
Optocoupler
TL431
C
c1
C
c2
R
ovs2
Figure 1
Table 1
Typical application
Output Power of 5
th
generation Quasi-Resonant Controller
Package
PG-DSO-8
Marking
5QSBG
220V
AC
±20%
1
109 W
85-300 V
AC1
60 W
Type
ICE5QSBG
1
Calculated maximum output power rating in an open frame design at T
a
=50°C, T
J
=125°C. The output power figure is for reference
purpose only. The actual power can vary depending on particular designs. Please contact to a technical expert from Infineon for more
information.
Please read the Important Notice and Warnings at the end of this document
page 1 of 27
V 2.1
2020-02-03
Datasheet
www.infineon.com
Quasi-Resonant Controller
Table of Contents
Table of Contents
Product Highlights .......................................................................................................................... 1
Features ........................................................................................................................................ 1
Applications ................................................................................................................................... 1
Description .................................................................................................................................... 1
Table of Contents ........................................................................................................................... 2
1
2
Pin Configuration and Functionality ......................................................................................... 4
Representative Block Diagram................................................................................................. 5
3
Functional Description............................................................................................................ 6
3.1
V
CC
Pre-Charging and Typical V
CC
Voltage during Start-up ..................................................................... 6
3.2
Soft-start .................................................................................................................................................. 6
3.3
Normal Operation ................................................................................................................................... 7
3.3.1
Digital Frequency Reduction ............................................................................................................. 7
3.3.1.1
Minimum ZC Count Determination .............................................................................................. 7
3.3.1.2
Up/down counter .......................................................................................................................... 7
3.3.1.3
Zero crossing (ZC counter) ........................................................................................................... 8
3.3.2
Ringing suppression time .................................................................................................................. 9
3.3.2.1
Switch on determination .............................................................................................................. 9
3.3.3
Switch off determination ................................................................................................................... 9
3.3.4
Modulated gate drive ....................................................................................................................... 10
3.4
Current limitation .................................................................................................................................. 10
3.5
Active Burst Mode with selectable power level .................................................................................... 11
3.5.1
Entering Active Burst Mode Operation ............................................................................................ 12
3.5.2
During Active Burst Mode Operation ............................................................................................... 12
3.5.3
Leaving Active Burst Mode Operation ............................................................................................. 12
3.6
Protection Functions ............................................................................................................................. 13
3.6.1
Line Over Voltage ............................................................................................................................. 14
3.6.2
Brownout .......................................................................................................................................... 14
3.6.3
V
CC
Ovder Voltage or Under Voltage ................................................................................................. 14
3.6.4
Over Load ......................................................................................................................................... 14
3.6.5
Output Over Voltage ........................................................................................................................ 14
3.6.6
Over Temperature ............................................................................................................................ 14
4
Electrical Characteristics ....................................................................................................... 17
4.1
Absolute Maximum Ratings .................................................................................................................. 17
4.2
Operating Range.................................................................................................................................... 17
4.3
Operating Conditions ............................................................................................................................ 18
4.4
Internal Voltage Reference.................................................................................................................... 18
4.5
Gate Driver ............................................................................................................................................. 18
4.6
PWM Section .......................................................................................................................................... 19
4.7
Current Sense ........................................................................................................................................ 19
4.8
Soft Start ................................................................................................................................................ 19
4.9
Digital Zero Crossing ............................................................................................................................. 20
4.10
Active Burst Mode.................................................................................................................................. 20
4.11
Line Over Voltage Protection ................................................................................................................ 21
4.12
Brownout Protection............................................................................................................................. 21
4.13
V
CC
Over Voltage Protection .................................................................................................................. 21
4.14
Over Load Protection ............................................................................................................................ 21
Datasheet
2 of 27
V 2.1
2020-02-03
Quasi-Resonant Controller
Table of Contents
4.15
4.16
4.17
5
6
7
Output Over Voltage Protection ........................................................................................................... 22
Thermal Protection ............................................................................................................................... 22
Low side MOSFET .................................................................................................................................. 22
Output power curve .............................................................................................................. 23
Outline Dimension................................................................................................................. 24
Marking................................................................................................................................ 25
Revision history............................................................................................................................. 26
Datasheet
3 of 27
V 2.1
2020-02-03
Quasi-Resonant Controller
Pin Configuration and Functionality
1
Pin Configuration and Functionality
The pin configuration is shown in Figure 2 and the functions are described in Table 2.
FB
1
PG-DSO-8
8
GND
VIN
2
7
VCC
CS
3
6
SOURCE
ZCD
4
5
GATE
Figure 2
Table 2
Pin
1
2
Pin Configuration
Pin Definitions and Functions
Symbol
FB
VIN
Function
Feedback & Burst entry/exit control
FB
pin combines the functions of feedback control, selectable burst entry/exit control
and overload/open loop protection.
Input Line OVP & Brownout
VIN
pin is connected to the bus via resistor divider (see Figure 1) to sense the line
voltage. This pin combines the functions of input Line OVP, Brownout, minimum
and maximum ZC count setting for low and high line.
Current Sense
The
CS
pin is connected to the shunt resistor for the primary current sensing
externally and to the PWM signal generator block for switch-off determination
(together with the feedback voltage) internally.
Zero Crossing Detection
ZCD
pin combines the functions of start up, zero crossing detection and output
over voltage protection. During the start up, it is used to provide a voltage level to
the gate of power switch Power MOSFET (see Figure 1) to charge V
CC
capacitor.
Gate Drive Output
This output signal drives the external main Power MOSFET (see Figure 1).
SOURCE
The
SOURCE
pin is connected to the source of external power switch Power
MOSFET (see Figure 1) which is in series connection with internal low side MOSFET
and internal VCC diode D3.
VCC(Positive Voltage Supply)
The
VCC
pin is the positive voltage supply to the IC. The operating range is
between V
VCC_OFF
and V
VCC_OVP
.
Ground
The
GND
pin is the common ground of the controller.
3
CS
4
ZCD
5
6
GATE
SOURCE
7
VCC
8
GND
Datasheet
4 of 27
V 2.1
2020-02-03
Quasi-Resonant Controller
Representative Block Diagram
2
Representative Block Diagram
VCC
LOVP
V
VIN_LOVP
C7a
250 µs
Blanking
time
ZCD
Thermal Protection
T
j
> T
jcon_OTP
50 µs
Blanking
time
S
R
T
j
< T
jcon_OTP
-T
jHYS_OTP
Autorestart
Protect
Q
OTP
Mode
Brown In / Out
V
VIN_BO
C16a
VIN
S
R
Q
Input
OVP
Mode
V
VIN_BI
250 µs
Blanking
time
S
R
Q
Brown
Out
Mode
C16b
Autorestart
Protect
Autorestart
Protect
Zero Crossing
V
ZCD_CT
Power Management
Undervoltage Lockout
16V
C2
D1
clk
ZC counter
&
10V
Voltage
Reference
Internal
Bias
D3
G1
Comparator
Up/down counter
C8
V
VIN_REF
t
VIN_REF
Counter
t
COUNT
V
VCC_OVP
Protection
S
Q
C12
50us
1
R
Autorestart
Protect
S Q
R
R
ZCD
G7
PWM Control
Soft-start
1
C6
V
ZCD_OVP
Counter
P
ZCD_OVP_B
G2
Autorestart
Protect
C1
V
ZCD_RS
Ringing
Suppression
T
OffMax
V
REF
V
FB_OLP
/
V
FB_LB
C12
t
FB_OLP_B
&
G5
1
&
G9
Gate
Drive
GATE
SOURCE
G4
1
S
G8
C5
R
FB
Burst
Mode
detect
V
FB_R
f
SB
OSC
V
CS_N
V
CS_BL1
&
G6
en
R
Q
T
OnMax
Gate
Drive
G3
C3
V
FB_HLC
Gate Driver
FB
25kΩ
C4
V
FB_LHC
Regulation
C13
V
CS_BL2
V
FB_EBL1
V
FB_EBL2
2pF
Burst Mode
Level Select
C15
t
FB_BEB
Active
Burst Mode
PWM
Comparator
V
PWM
V
1
V
CS_FB
Peak
Current
Limit
C9
C20
V
FB_BOn
C10
G
PWM
PWM OP
Leading
Edge
Blanking
t
CS_LEB
10kΩ
1pF
D2
CS
Current Mode
V
FB_BOff
C11
Delay
t
CS_STG_SAM
C17
V
CS_STG
GND
Active Burst Block
Current Limiting/ Current Sense short to Gnd Protection
Figure 3
Representative Block Diagram
Datasheet
5 of 27
V 2.1
2020-02-03
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
