NCP1395A/B
High Performance Resonant
Mode Controller
The NCP1395A/B offers everything needed to build a reliable and
rugged resonant mode power supply. Its unique architecture includes
a 1.0 MHz Voltage Controller Oscillator whose control mode brings
flexibility when an ORing function is a necessity, e.g. in multiple
feedback paths implementations. Protections featuring various
reaction times, e.g. immediate shutdown or timer−based event,
brown−out, broken optocoupler detection etc., contribute to a safer
converter design, without engendering additional circuitry
complexity. An adjustable deadtime also helps lowering the
shoot−through current contribution as the switching frequency
increases.
Finally, an onboard operational transconductance amplifier allows
for various configurations, including constant output current working
mode or traditional voltage regulation.
Features
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MARKING
DIAGRAMS
16
1
PDIP−16
P SUFFIX
CASE 648
1
16
NCP1395xP
AWLYYWWG
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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High Frequency Operation from 50 kHz up to 1.0 MHz
Selectable Minimum Switching Frequency with
"3%
Accuracy
Adjustable Deadtime from 150 ns to 1.0
ms
Startup Sequence via an Adjustable Soft−Start
Brown−Out Protection for a Simpler PFC Association
Latched Input for Severe Fault Conditions, e.g. Overtemperature
or OVP
Timer−Based Input with Auto−Recovery Operation for Delayed
Event Reaction
Enable Input for Immediate Event Reaction or Simple ON/OFF
Control
Operational Transconductance Amplifier (OTA) for Multiple
Feedback Loops
V
CC
Operation up to 20 V
Low Startup Current of 300
mA
Max
Common Collector Optocoupler Connection
Internal Temperature Shutdown
B Version Features 10 V V
CC
Startup Threshold for Auxiliary
Supply Usage
Easy No−Load Operation and Low Standby Power Due to
Programmable Skip−Cycle
These are Pb−Free Devices
LCD/Plasma TV Converters
High Power Ac−DC Adapters for Notebooks
Industrial and Medical Power Sources
Offline Battery Chargers
16
1
SO−16
D SUFFIX
CASE 751B
x
A
WL
YY, Y
WW
G
1395xDR2G
AWLYWW
= A or B
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Fmin 1
Fmax 2
DT 3
Css 4
FB 5
Ctimer 6
BO 7
AGnd 8
(Top View)
16 NINV
15 Out
14 Slow Fault
13 Fast Fault
12 Vcc
11 B
10 A
9
PGnd
Typical Applications
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 25 of this data sheet.
©
Semiconductor Components Industries, LLC, 2008
September, 2008
−
Rev. 4
1
Publication Order Number:
NCP1395/D
NCP1395A/B
PIN FUNCTION DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
Fmin
Fmax
DT
Css
FB
Ctimer
BO
Agnd
Pgnd
A
B
Vcc
Fast Fault
Slow Fault
OUT
NINV
Function
Timing Resistor
Frequency Clamp
Deadtime
Soft−Start
Feedback
Timer Duration
Brown−Out
Analog Ground
Power Ground
Low Side Output
High Side Output
Supplies the Controller
Quick Fault Detection
Slow Fault Detection
OPAMP Output
OPAMP Noninverting
Description
Connecting a resistor to this pin, sets the minimum oscillator frequency
reached for VFB is below 1.3 V.
A resistor sets the maximum frequency excursion.
A simple resistor adjusts the deadtime length.
Select the soft−start duration.
Applying a voltage above 1.3 V on this pin increases the oscillation frequency
up to Fmax.
Sets the timer duration in presence of a fault.
Detects low input voltage conditions. When brought above Vlatch, it fully
latches off the controller.
−
−
Drives the low side power MOSFET.
Drives the upper side power MOSFET.
−
Fast shutdown pin, stops all pulses when brought high. Please look in the
description for more details about the fast−fault sequence.
When asserted, the timer starts to countdown and shuts down the controller at
the end of its time duration.
Internal transconductance amplifier.
Non−inverting pin of the OPAMP.
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3
NCP1395A/B
MAXIMUM RATINGS
Rating
Power Supply Voltage, Pin 12
Transient Current Injected into V
CC
when Internal Zener is Activated –
Pulse Width < 10 ms
Power Supply Voltage, All Pins (Except Pins 10 and 11)
Thermal Resistance, Junction−to−Air, PDIP Version
Thermal Resistance, Junction−to−Air, SOIC Version
Storage Temperature Range
ESD Capability, Human Body Model
ESD Capability, Machine Model
Symbol
V
CC
−
−
R
qJA
R
qJA
−
−
−
Value
20
10
−0.3
to 10
130
100
−60
to +150
2
200
Unit
V
mA
V
°C/W
°C/W
°C
kV
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000V per JESD22−A114−B
Machine Model Method 200V per JESD22−A115−A.
2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.
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PCB设计
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