bd8621efv ROHM Co. Ltd., bd8621efv Datasheet - Page 3

• Manufacturer Part Number: bd8621efv
• Description: Built-in 1ch Fet Synchronous Rectification Type Dc/dc Converters
• Manufacturer: ROHM Co. Ltd.

● Block Diagram
● Pin Description
No.
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
SS/DELAY
Symbol
SGND
PGND
PGND
PGND
PDET
TEST
REG
SW
SW
SW
SW
VIN
VIN
VIN
VIN
EN
FB
FC
RT
Signal GND terminal
Feed back terminal
Off latch signal output
Output terminal
Power GND terminal
Output terminal
Power supply input terminal
Internal Regulator
Enable input
Terminal for test
Soft start adjustment capacity connection terminal
Error amplifier output
Frequency adjustment resistance connection terminal
Description
Fig1
Block diagram
3 / 14
Small signal system GND
Output voltage detection
Protecting BUS communication terminal
Switching output
GND for power MOSFET
Power Mos output
Power supply input. The decoupling is done to PGND
Synchronizable switching output terminal frequency with external clock
ON/OFF control for device operation
SGND short in the set.
The soft start time is adjusted with the connected capacitor
Error amplifier phase compensation point
The switching frequency is set by the connected resistance
Explanation