BM81110MUW Datasheet, PDF (27/50 Pages) Rohm – 12V Input Multi-Channel System Power Supply IC

BM81110MUW
Upper limit voltage setting of VGH thermal compensation
VL 5V
5V
R12_1
36
Low Temp setting is
selected.
32
NTC setting is selected.
NTC
R12_2 RNTC
28
(Therminstor)
NTC
Setting
Normal Temp setting
Θ
is selected.
24
Ta [℃]
Figure 42. VGH thermal compensation
Low
Temp
Setting
(VGH_H)
Normal
Temp
Setting
(VGH_L)
This IC installs the thermal compensation function for VGH voltage. VGH thermal compensation upper limit voltage
(VGH_H) is settable by changing the EEPROM setting.
Thermal gradient setting is possible by the thermistor (R_NTC) connected to NTC pin and the resistor divider
(R_NTC1, R_NTC2).
FAULT function
The FAULT output indicates the status of the protection circuit of this IC.
Because FAULT is an open-drain output, place a pull-up resistor externally.
When the FAULT output will not be used, leave the pin OPEN.
10～220[kΩ]
FAULT
Figure 43. FAULT Terminal
The recommended external pull-up resistance for the FAULT output is 10kΩ to 220kΩ. An external resistance of under
10kΩ can generate an offset voltage during FAULT=L caused by the voltage drop across the internal ON resistance. On the
other hand, an external resistance of more than 220kΩ can interfere with the output during FAULT=H because of leak
current.
The conditions that FAULT terminal becomes Low are as follows.
・If UVLO operates
・If UVP operates
・If TSD operates
When FAULT function is not used, connect NTC pin to GND, or please make it open.
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TSZ22111・15・001
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TSZ02201-0313AAF00410-1-2
2015.08.10 Rev.002