APW7046 Ver la hoja de datos (PDF) - Anpec Electronics

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componentes Descripción

Fabricante

APW7046

Dual Advanced PWM and Source-Sink Linear Controller

Anpec Electronics 

APW7046

Electrical Characteristics (Cont.)

Unless otherwise specified, these specifications apply over VCC=VBOOT=12V and TA=0~70°C.

Typical values refer to TA=25°C.

Symbol

Parameter

IVIN VIN Input Bias Current

PWM Controllers Gate Drivers

IUGATE UGATE1,2 Source

RGATE UGATE Sink

Protection

VSEN1,2 OVP trip point

(VSEN1/VCORE and VSEN2/VMEM )

VSEN1,2 O.V. Hysteresis

IOCSET Ocset Current Source

ISS Soft start Current

Test Conditions

VIN=2.5V

APW7046

Min. Typ. Max.

2

Unit

uA

VCC=VBOOT=12V,

VUGATE1,2=6V

VCC=12V,VUGATE1,2=6V

0.74

A

3

4

Ω

VSEN Rising

Vocset=3V

115 120

%

2

170 200 230

uA

28

Functional Pin Description

VCC (Pin 1)

Provide a +12V bias supply for the IC to this pin. This

pin also provides the gate bias charge for the

MOSFETs of the SOURCE-SINK regulator. The volt-

age at this pin is monitored for Power-On Reset (POR)

purposes.

UGATE1 (Pin 2)

Connect this pin to the MOSFET gate of the PWM1

converter. This pin provides the gate drive for the

MOSFET.

sets the soft-start interval of all power controls and

preventing the outputs from overshoot as well as limit-

ing the input current .

SD (Pin 5)

The pin shuts down all power outputs. A TTL compat-

ible , logic level high signal applied at this pin immedi-

ately discharges the soft-start capacitor,disabling all

power outputs. When re-enabled, the IC undergoes a

new soft-start cycle. Left open, this pin is pulled low

by an internal pull-down resistor, enabling operation.

PHASE1 (Pin 3)

Connect this pin to the PWM1 converter’s MOSFET

source.This pin is used to monitor the voltage drop

across the MOSFET for over-current protection.

SOURCE (Pin 6)

Connect this pin to the upper MOSFET gate drive of

the SOURCE-SINK regulator. This pin drives the up-

per external MOSFET as a sourcing regulator.

SS (Pin 4)

Connect a capacitor from this pin to ground.This

capacitor, along with an internal 28uA current source,

SINK (Pin 7)

Connect this pin to the lower MOSFET gate drive of

Copyright  ANPEC Electronics Corp. Rev. A.

4

Rev.A.2 - Mar., 2002

www.anpec.com.tw

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