BD9203EFV Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

○ BLOCK DIAGRAM
VIN
CIN
CVREF
VREF5V
UVLO
VCC
VCC
CVCC STB
SLOPE
RT
VREG
+
OSC
UVLO
(VCC) ^UVLO
OSDET
TSD OVP
FILTER
PWM COMP
+
-
-
Control
Logic
Driver
Durrent
SS
Sence
AGND
FB
RPC
CPC
ERR AMP
-
-
-
-
-
-
+
SEL
PWM1
PWM2
Current driver
OVP
CP
CP
FAIL
N
CS
PGND3
LED1
LED2
LED3
LED4
LED5
LED6
+
COUT
○ PACKEGE, MARKING SPECIFICATION
VREF
ISET
ISET
Open-Short
Detect
PGND1
PGND2
OSDET
BD9203EFV
3/4
LOT No.
HTSSOP-B28
○ PIN No. & PIN NAME
PIN
No.
PIN Name
1
PGND3
2
N
3
SEL
4
FAIL
5
UVLO
6
PWM2
7
PWM1
8
VCC
9
STB
10
VREF5V
11
AGND
12
RT
13
SLOPE
14
ISET
Function
PIN
No.
Power GND
15
DC/DC switching output
16
Active LED channel select pin
(3 state)
17
Protect signal output
18
Under voltage lock out input
19
External PWM input 2
20
External PWM input 1
21
Power Supply Voltage
22
Enable pin
23
Internal regulator output
24
Analog GND
25
CT frequency setting R
26
Slope compensation setting R 27
LED output current setting R
28
PIN Name
VREF
CP
FB
PGND1
LED1
LED2
LED3
LED4
LED5
LED6
PGND2
SS
OVP
CS
Function
DC dimming input
Filter set Cap.
Error amp output
LED output GND1
LED output 1
LED output 2
LED output 3
LED output 4
LED output 5
LED output 6
LED output GND2
Soft start period setting Cap.
DC/DC over voltage protection
DC/DC current sense
REV. Ａ