bd8622efv ROHM Co. Ltd., bd8622efv Datasheet - Page 3

• Manufacturer Part Number: bd8622efv
• Description: Built-in 1ch Fet Light Load 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 Soft start adjustment capacity connection terminal
Symbol
MODE
SGND
PGND
PDET
SW
SW
SW
SW
VIN
VIN
VIN
VIN
NC
NC
NC
EN
FC
RT
FB
Signal GND terminal
Feed back terminal
Abnormal state notification and external IC
abnormality detection terminal
Switching output terminal
Power GND terminal
Power supply input terminal
Enable input
MODE selection terminal
Error amplifier output
Frequency adjustment resistance connection terminal
Description
10
Down
Shut
Detect Abnormal
Voltage
and Start error
Fig1
Err AMP
Block diagram
PWM/PFM
CONTROL
Predrive
3 / 15
Small signal system GND
Output voltage detection
Protecting BUS communication terminal
GND for power MOSFET
Power supply input. The decoupling is done to PGND
ON/OFF control for device operation
The operation mode is switched according to the input voltage
The soft start time is adjusted with the connected capacitor
Error amplifier phase compensation point
The switching frequency is set by the connected resistance
at a light load.
Explanation