bd9211f ROHM Co. Ltd., bd9211f Datasheet - Page 3

• Manufacturer Part Number: bd9211f
• Description: Led Driver Control Ic
• Manufacturer: ROHM Co. Ltd.

〇 External Dimensions
〇 Block Diagram
○Pin Number, Pin Name, Pin Function
Pin
No
1
2
3
4
5
6
7
8
9
VCC
STB
GND
RT
FB
IS
VS
PWMCMP
CP
name
Pin
, Marking
Power supply pin for IC （built-in UVLO function）
Power ON/OFF control pin for IC
Signal/ground pin for internal IC
Lamp current, lamp voltage, error amp outputs
Error amp input pin for lamp current feedback
Error amp input pin for lamp voltage feedback at
the opening time.
PWM comparator input pin which controls PWM
operation during brightness adjustment.
Timer latch-setting pin
Drive frequency set up terminal.
Functions
SOP18 (Unit:mm)
BD9211F
REV. A
Pin
No
10
11
12
13
14
15
16
17
18
PWMIN
SDON
SS
FAIL
COMPSD
COMP
PGND
N2
N1
name
Pin
PWM signal input pin for burst bright adjustment
control
Enable pin of COMPSD inputs over voltage
detection
Soft-start set up pin
Error Indication signal Output Normal : L, Error :
OPEN
Detection pin for over voltage shut down
Detection pin for over voltage and shut-down delay
Power Ground for external MOSFET drive
Output pin for external FET drive circuit (Ch. N2)
Output pin for external FET drive circuit (Ch. N1)
Lot No.
Dvice Mark
Functions
3/4