APU3073O 查看數據表（PDF） - Advanced Power Electronics Corp

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APU3073O

SYNCHRONOUS PWM CONTROLLER WITH OVER-CURRENT PROTECTION / LDO CONTROLLER

Advanced Power Electronics Corp 

APU3073

PARAMETER

Error Amp

Fb Voltage Input Bias Current

Fb Voltage Input Bias Current

VP Voltage Range

Transconductance

Oscillator

Frequency

Ramp Amplitude

Output Drivers

Rise Time

Fall Time

Dead Band Time

Max Duty Cycle

Min Duty Cycle

LDO Controller Section

Drive Current

Fb Voltage

Input Bias Current

Thermal Shutdown

Current Limit

OC Threshold Set Current

OC Comp Off-Set Voltage

SYM

IFB1

IFB2

VP

Freq

VRAMP

Tr

Tf

TDB

DMAX

DMIN

Drv1

IOCSET

VOC(OFFSET)

TEST CONDITION

SS=3V

SS=0V

Note 1

Rt=100K

Rt=50K

Note 1

CLOAD=1500pF

CLOAD=1500pF

Fb=0.7V, Freq=200KHz

Fb=0.9V

Note 1

Note 1: Guaranteed by design but not tested in production.

MIN TYP MAX UNITS

-5 -0.1 +5 mA

35

55

75

mA

0.8

1.5

V

700

mmho

180 210 240 KHz

340 400 460

1.25

VPP

50 100 ns

50 100 ns

100

ns

85

90

%

0

%

40

65

mA

0.784 0.8 0.816 V

-1 -0.1 +1 mA

150

8C

20

30

40

mA

-5

0

+5 mV

PIN DESCRIPTIONS

PIN#

1

2

3

PIN SYMBOL

Fb2

Drv2

Rt

PIN DESCRIPTION

These pins provide feedback for the linear regulator controllers.

Outputs of the linear regulator controllers.

A resistor should be connected from this pin to ground for setting the switching frequency.

This pin provides soft-start for the switching regulator. An internal current source charges

4

SS / SD an external capacitor that is connected from this pin to ground which ramps up the output

of the switching regulator, preventing it from overshooting as well as limiting the input

current. The converter can be shutdown by pulling this pin down below 0.4V.

5

Comp

Compensation pin of the error amplifier. An external resistor and capacitor network is

typically connected from this pin to ground to provide loop compensation.

6

Fb1

This pin is connected directly to the output of the switching regulator via resistor divider to

provide feedback to the Error amplifier.

7

VP1

Non-inverting input of error amplifier.

8

VREF

Reference voltage.

9

Vcc

This pin provides biasing for the internal blocks of the IC as well as powers the LDO

controller. A minimum of 1mF, high frequency capacitor must be connected from this pin

to ground to provide peak drive current capability.

10

VcL

This pin powers the low side output driver and can be connected either to Vcc or separate

supply. A minimum of 1mF, high frequency capacitor must be connected from this pin to

ground to provide peak drive current capability.

11

LDrv

Output driver for the synchronous power MOSFET.

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