BD9883AF-E2 Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

〇Package Dimensions
(Include BURR 12.85)
BD9883AF
１
Device Mark
Lot No.
BD9883
１
3/4
Device Mark
Lot No.
SOP20 (Unit:mm)
SSOP-B20 (Unit:mm)
〇Block Diagram
〇Pin Description
SS
CT RT
BRT BCT DUTY
VCC
Pin No. Pin Name
Function
STB
STB
BLOCK
SYSTEM ON/OFF
1
+
OSC
BOSC
-
2
VCC
3
FB
IS
-
+
VS
-
+
F/B
BLOCK
PWM
BLOCK
VCC
UVLO
-
+
REG
REG
BLOCK
4
LOGIC
BLOCK
BST
HN
OUTPUT
HN
5
BLOCK
SW
LN
LN
6
OUTPUT
BLOCK
PGND
7
DUTY
BCT
BRT
CT
RT
SRT
GND
Control PWM mode and BURST mode
External capacitor from BCT to GND for
adjusting the BURST triangle oscillator
External resistor from BRT to GND for
adjusting the BURST triangle oscillator
External capacitor from CT to GND for
adjusting the triangle oscillator
External resistor from RT to GND for
adjusting the triangle oscillator
External resistor from SRT to RT for
adjusting the triangle oscillator
GROUND
8
FB
Error amplifier output
9
IS
Error amplifier input①
10
VS
Error amplifier input②
GND
VS
PROTECT
IS
BLOCK
11
STB Stand-by switch
12
External capacitor from SCP to GND for
SCP
Timer Latch
13
SS
External capacitor from SS to GND for Soft
Start Control
SCP SRT
14
PGND Ground for FET drivers
15
LN
NMOS FET driver
16
HN
NMOS FET driver
17
SW
Low voltage for HN output
18
BST Boot-Strap input for HN output
19
REG Internal regulator output
20
VCC Supply voltage input
REV. E