BD9204F Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

○ BLOCK DIAGRAM
VIN
VCC
GND
ADIM
STB
PDIM
FAIL
GND1
STB
VREF
PDIM
SEL
FAIL
REG
PGND
VIN
BD9204F
VCC
N1
RT
OCP1
SS
ILED1
GND
COMVP1
STB
COMFBP11
VREF
PWM
N2
SEL
OCP2
ILED2
FAIL
COOMVP2
VRREEFG4V COMFBP22
CP
PGND
PGND
PGND
COMFBP33
N3
OCP3
UVLO
ILED3
COOMVPP33
○PACKEGE, MARKING SPECIFICATION SOP-28
PGND
VIN
GND1
PGND
VIN
GND1
PGND
GND1
BD9204F
Lot No.
3/4
○ PIN No. & PIN NAME
No. name
function
1 VREF analog dimming signal input
2 FAIL abnormal state output
3 SS soft start setting
4 RT oscillation frequency setting
5 OCP3 CH3 DCDC over current protection
6 PGND power ground pin
7 N3 CH3 DCDC switching output
8 OCP2 CH2 DCDC over current protection
9 N2 CH2 DCDC switching output
10 OCP1 CH1 DCDC over current protection
11 N1 CH1 DCDC switching output
12 STB ON/OFF logic input
13 VCC Power pin
14 VREG internal power supply output
No. name
function
15 ILED1 CH1 current signal feedback input
16 COMP1 CH1 error amplifier output
17 COMP2 CH2 error amplifier ouput
18 COMP3 CH3 error amplifier output
19 SEL power on channel select input
20 UVLO the voltage monitor input for UVLO
21 GND analog ground pin
22 PWM PWM dimming signal input
23 OVP1 CH1 boost voltage monitor input
24 OVP2 CH2 boost voltage monitor input
25 OVP3 CH3 boost voltage monitor input
26 CP latch OFF timer setting
27 ILED3 CH3 current signal feedback input
28 ILED2 CH2 current signal feedback input
REV. Ａ