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AN8011S Arkusz danych(PDF) 2 Page - Panasonic Semiconductor

Numer części AN8011S
Szczegółowy opis  2-channel step-down, step-up, or inverting use DC-DC converter control IC
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Producent  PANASONIC [Panasonic Semiconductor]
Strona internetowa  http://www.panasonic.com/industrial/
Logo PANASONIC - Panasonic Semiconductor

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2
AN8011S
Voltage Regulators
s Pin Descriptions
Pin No.
Symbol
Description
1
CT
Pin for connecting the oscillation frequency setting capacitor for triangular oscillation
circuit. Frequecy of triangular oscillation is set by connecting a capacitor between this
terminal and GND.
2
RT
Resistor connection pin for setting the oscillation frequency of triangular oscillation
circuit. Frequecy of triangular oscillation is set by connecting resistance between the
pin and GND
3
On/Off
"On/Off" pin for turning on/off IC. "Low" stops IC (output off) and "High" operates IC.
4IN
−2
Inverted input pin for channel 2 error amplifier
5
F/B 2
Output pin for channel 2 error amplifier. Gain setting or phase compensation is per-
formed by connecting resistor or capacitor between the pin and IN
−2. It is also connected
to PWM short-circuit protecion.
6
DTC 2
Pin for setting dead-time period of channel 2. The dead-time of channel 2 is set by
connecting external resistor. Soft start function can be also given by connecting capaci-
tor in parallel with the external resistor. In addition, only channel 2 output can be turned
off by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop
circuit)
7
Out 2
Channel 2 open-collector type output pin. IO = 100 mA maximum
8
GND
Grounding pin of signal system.
9VCC
Power supply voltage application pin. It detects start voltage and stop voltages
10
Out 1
Channel 1 open-collector type output pin. IO = 100 mA maximum
11
DTC 1
Pin for setting dead-time period of channel 1. The dead-time period of channel 1 is set
by connecting external resistor. Soft start function can be also given by connecting capacitor
in parallel with the external resistor. In addition, only channel 1 output can be turned off
by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop
circuit)
12
F/B 1
Output pin for channel 1 error amplifier. Gain setting or phase compensation is per
formed by connecting resistor or capacitor between the pin and IN
−1. It is also con
nected to PWM short-circuit protection.
13
IN
−1
Inverted input pin for channel 1 error amplifier.
14
IN
+
Pin for noninverted input of channel 1error amplifier.
15
Latch
Pin for connecting the time constant setting capacitor for timer latch type short-circuit
protection circuit. The time constant for short-circuit protection is set by connecting
a capacitor between this terminal and GND.
16
VREF
Internal reference voltage output pin (2.5 V(allowance:
±3%)). If a load of 20 mA typical
or more is applied, the overcurrent protection operates to reduce VREF and switching
operation stops.


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