BD8624EFV ROHM [Rohm], BD8624EFV Datasheet - Page 13

• Manufacturer Part Number: BD8624EFV
• Description: Built-in 1ch FET Synchronous Rectification Type DC/DC converters
• Manufacturer: ROHM [Rohm]

Soft start time-out function
DC/DC converter off-latch-controls when V
passed from soft start.
Error detection (off latch) release method
DC/DC converter becomes off latch condition when protection function operates. Off latch can be released by the
following method. DC/DC converter controller of each Ch becomes able to do ON control transition by releasing off latch.
Error detection time set function
Time from the error detection to the off latch can be set by putting resistance outside between GND and RSET terminal.
Rset setting range
10kΩ≦Rset≦75kΩ
（18usec≦tofflach≦135usec）
t
offlatch
1. Set all Ch CTL terminal voltage as < V
2. Drop down power supply VCC to below 2.7V(TYP).

1
.
8

10

3

Rrset
u [
sec]
SS
ILCTL
does not exceed V
Figure 5-3. At soft start time-out
and continue that condition about more than 200usec (typ).
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SSPON
from V
SS
> V
SSSTB
+V
SSSTB_HYS
after 50msec (typ)