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HA16114 View Datasheet(PDF) - Renesas Electronics

Part NameDescriptionManufacturer
HA16114 Switching Regulator for Chopper Type DC/DC Converter Renesas
Renesas Electronics Renesas
HA16114 Datasheet PDF : 34 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
HA16116FP/FPJ, HA16121FP/FPJ
5.2 Quick Shutoff
When the UVL circuit goes into operation, a sink transistor is switched on as in the figure below, drawing
off the excess current. This transistor also functions when the IC is turned off, drawing off current from the
CT, E/O, and DB pins and enabling quick shutoff.
PWM
output
On
PWM
output
off
PWM output on
PWM
output off
Off
1.7 2.0 2.5
5.0 7.0
When VIN is
low
Abnormal voltage
applied to Vref
Relation of Vref to UVL and OVP
VIN
Vref
Vref
generation
circuit
OVP
2.0 V and
Vref
1.7 V
detection
ZD
5.6 V
R
Internal
pulse
signal
line
UVL
OUT
Sink
10 k
transistor
To other circuitry
Figure 5.1 Quick Shutoff
Vref (V)
OUT
Rev.2.0, Sep.18.2003, page 14 of 33
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