White LED Cup Light Controller
Features
˙Precision
reference voltage: 0.5V (±2%)
˙Wide
operation input voltage: 3.0V ~ 18V
˙High
output loading current: typ. 2.0A
˙Fixed
PWM frequency: typ. 360KHz
˙Programmable
soft-start
˙Thermal
shutdown and short circuit protection
˙Compensation
and ON/OFF control
˙Package:
SOP8
Pb
General Description
The
MR163,
a 1-chip composed of high current MOS with a fixed PWM oscillator
and an error amplifier with a 0.5V precision voltage reference for LED current
feedback and driving capaciblity, applied to offer space and low cost in many
applications such as the DC/DC bcuk converter and serial white LEDs cup light
controller and driver.
Typical Application Circuit
Vin
1
2
4
IC1
Vcc
SS
FB
LX2
LX1
IN-
8
7
3
L1
Vout
D1
White LED
MR163
GND1
GND2
D2 10uH
SK23
+
5
6
C3
22uF
C2
0.1
C1
0.1
R1
1
High-Brightness White LED Cup Application Example
http://www.hawyang.com.tw/
-1-
MR163 Functional Block Diagram
MARK VIEW
PIN DESCRIPTION
NAME STATUS
VCC
P
I
I
I
P
DESCRIPTION
IC Power Supply
Soft-Start / SCP Control
Input
Negative Feedback Input
Compensation Input
(On/Off)
IC Ground
LX1 LX2 GND2 GND1
MR163
A3472L
VCC SS
FB
IN-
SS
IN-
FB
GND1
GND2
LX1
LX2
O
MOS Switching Output
http://www.hawyang.com.tw/
-2-
IC Date Code Distinguish
MR163
A
3 4
7 2
L
Year
Week
Lot No.
Pb free
Logo:
Hawyang logo
Product name:
MR163
(for example)
D/C:
A3472
A
– year 2001,
B
– year 2002,
C
– year 2003
34
– week
72
– lot no. last 2 code
Order Information
Part Number
MR163DLF
MR163DLF(R)
Operating Temperature
-20℃∼85℃
-20℃∼85℃
Package
SOP8
SOP8
Description
Tube
Tape & Reel
http://www.hawyang.com.tw/
-3-
Absolute Maximum Ratings
Symbol
V
CC
V
FB
V
O
I
O
T
j
SOP package
Parameter
Supply Voltage
Analog Input Voltage
LX Output Voltage
Output Current
Maximum Junction Temperature
Thermal Resistance Junction to Ambient
Power Dissipation
Rating
+20 V
-0.3 V∼+1.2V
+30 V
3A
150℃
175℃/W
SOP8 package
Ta=25℃
Ta=70℃
650mW
550mW
-20℃∼85℃
-65℃∼150℃
+260℃
T
OPR
T
STG
soldering, 10 sec
Operating Temperature Range
Storage Temperature Range
Lead Temperature
http://www.hawyang.com.tw/
-4-
Electrical Characteristics
Electrical characteristics over recommended operating temperature
range,V
CC
=6V,unless otherwise noted
Reference Section
PARAMETER
Output voltage
Input regulation
SYMBOL TEST CONDITIONS MIN
V
REF
△V
REF
FB is connected to IN-
V
CC
＝3.6
V to 20 V
0.49
-
-
-
TYP
0.5
2.0
1
1
MAX
0.51
13
2
2
UNIT
V
mV
%
T
A
＝
-
20℃ to 25℃
Output voltage change
△V
REF
/V
REF
with temperature
T
A
＝
25℃ to 85℃
†All typical values are at T
A
＝25℃.
Soft-Start (S.S.) Section
PARAMETER
Source Current
Threshold Voltage
SYMBOL TEST CONDITIONS MIN
I
SS
V
SST
V
SS
=0V
-
-7
0.9
TYP
-12
1.0
MAX
-17
1.1
UNIT
µA
V
†All typical values are at T
A
＝25℃.
Short Circuit Protection Section
PARAMETER
Source Current
Threshold Voltage
ON/OFF time ratio
SYMBOL TEST CONDITIONS MIN
I
SCP
V
SCPT
r
V
SCP
= 0V
V
FB
> 450mV
V
FB
= 0V
-7
1.0
-
TYP
-12
1.15
1/20
MAX
-17
1.2
-
UNIT
µA
V
-
†All typical values are at T
A
＝25℃.
Thermal Shutdown Section
PARAMETER
TSD temperature
SYMBOL TEST CONDITIONS MIN
TSD
-
-
TYP
145
MAX
-
UNIT
℃
http://www.hawyang.com.tw/
-5-
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