BD9893F Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

〇Package Dimensions
(include BURR : 10.35)
BD9893F
3/4
Device Mark
Lot No.
SOP16 (unit:mm)
〇Block Diagram
〇Pin Description
SS
STB
STB
BLOCK
SYSTEM ON/OFF
RT
BCT
DUTY
VCC
+
OSC
BOSC
-
Pin No.
1
2
Pin
Name
RT
SRT
Function
External resistor from RT to GND for adjusting
the internal triangle oscillator
External resistor from SRT to RT for adjusting
the internal triangle oscillator
FB
PWM
3
FB ^{Error amplifier output}
BLOCK
N1
LOGIC
OUTPUT
4
IS ^{Error amplifier inputâ‘} 
IS
-
+ _1.25V
VCC
F/B
BLOCK
BLOCK
N2
5
PGND
6
VS ^{Error amplifier input②}
GND ^GROUND
BLOCK
VS
-
+
1.25V
UVLO
-
+
7
DUTY ^{Control PWM mode and BURST mode}
8
External capacitor from BCT to GND for adjusting
BCT _{the BURST triangle oscillator}
9
COMP ^{Under, over voltage detect}
VCC
Reg
REG
BLOCK
VS
IS
PROTECT
BLOCK
10
External capacitor from SCP to GND for Timer
SCP _Latch
11
External capacitor from SS to GND for Soft Start
SS _Control
12
Stand-by switch
STB _{Select the BURST dimming direction}
GND
13
N2 FET driver
14
PGND ^{Ground for FET drivers}
COMP
SCP SRT
15
N1 ^{FET driver}
16
VCC ^{Supply voltage input}
REV. A