BD8622EFV_09 ROHM [Rohm], BD8622EFV_09 Datasheet - Page 3

• Manufacturer Part Number: BD8622EFV_09
• Description: Built-in 1ch FET Light Load Type DC / DC converters
• Manufacturer: ROHM [Rohm]

●Block diagram
●Pin Description
© 2009 ROHM Co., Ltd. All rights reserved.
BD8622EFV
www.rohm.com
No.
10
12
13
14
15
16
17
18 SS/DELAY
19
20
11
1
2
3
4
5
6
7
8
9
Symbol
MODE
SGND
PGND
PDET
SW
SW
SW
SW
VIN
VIN
VIN
VIN
NC
NC
NC
EN
FB
FC
RT
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
Soft start adjustment capacity connection terminal
Error amplifier output
Frequency adjustment resistance connection terminal The switching frequency is set by the connected resistance
Description
10
1
3
4
5
6
7
8
9
Down
Shut
Detect Abnormal
Voltage
and Start error
Fig1 Block diagram
0.8V
Err AMP
PWM/PFM
CONTROL
3/15
Predrive
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
at a light load.
The soft start time is adjusted with the connected capacitor
Error amplifier phase compensation point
Small signal system GND
Explanation
Technical Note
2009.05 - Rev.A