BD9244AFV View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
View to exact match
BD9244AFV Datasheet PDF : 5 Pages
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〇Package Dimensions
3/4
〇Block Diagram
BD9244AFV
DEVICE MARK
Lot No.
VCC
REG
RT
BCT
DUTY
REG
BLOCK
OSC
BLOCK
STB
STB
SYSTEM ON/OFF
CT
BLOCK
BOSC
BLOCK
DUTY
BLOCK
REG
FB
IS
F/B
BLOCK
VS
SS
BLOCK
CT_COUNTER
GND
CT
PWM
BLOCK
CT
LOGIC
BLOCK
OUTPUT
BLOCK
PROTECT
BLOCK
VCC
VLO
ブロック
COMP CP
SRT
VLO
FAIL
BST1
HN1
SW1
LN1
BST2
HN2
SW2
LN2
PGND
SSOP-B24 (UNIT:mm)
○Pin Description
PIN
PIN NAME
No.
FUNCTION
1 PGND
Power Ground for FET drivers
PIN
PIN NAME
No.
FUNCTION
13 FAIL
Error Indication signal output ( Normal : L, Error : OPEN)
2 LN2
3 BST2
4 HN2
5 SW2
6 VCC
7 STB
8 SRT
9 RT
10 GND
11 BCT
NMOS FET driver (Ch. 2)
14 CP
Boot-strap input for HN2 output
NMOS FET driver (Ch. 2)
Lower rail voltage for HN2 output
15 FB
16 IS
17 VS
Power supply input with UVLO Protection
18 COMP
Stand-by switch
19 VLO
External resister from SRT to RT for adjusting the start-up
20 SW1
Triangle oscilator
External resistor between RT and GND for adjustment
frequency of saw tooth wave
21 HN1
Ground
22 BST1
External capacitor between BCT and GND for adjusting
the BURST triangle oscillator
23 REG
External capacitor between CP and GND for timer latch
Error amplifier output
Error amplifier input 2
Error amplifier input 1
Input of over voltage detector
External Under Voltage Lock Out and Over Voltage Protection
Lower rail voltage for HN1 output
NMOS FET driver (Ch. 1)
Boot-strap input for HN1 output
regulator output
12 DUTY
Control Burst-dimming by PWM signal or DC
24 LN1
NMOS FET driver (Ch. 1)
REV. A
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