AMS2263 Просмотр технического описания (PDF) - Advanced Monolithic Systems Inc

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производитель

AMS2263

highly integrated current mode PWM control IC

Advanced Monolithic Systems Inc 

AMS 2263

TERMINAL ASSIGNMENTS

Pin Name

GND

FB

RI

SENSE

VDD

GATE

I/O

Description

P Ground

I

Feedback input pin. The PWM duty cycle is determined by voltage level into this pin

and SENSE pin input.

I

Internal Oscillator frequency setting pin. A resistor connected between RI and GND

sets the PWM frequency.

I

Current sense input pin. Connected to MOSFET current sensing resistor node.

P Chip DC power supply pin.

O Totem-pole gate drive output for the power MOSFET.

RECOMMENDED OPERATING CONDITION

Symbol

Parameter

VDD

RI

TA

VDD Supply Voltage

RI Resistor Value

Operating Ambient Temperature

Min － Max

10 to 30

100

-20 to 85

Unit

V

Kohm

oC

ELECTRICAL CHARACTERISTICS

(TA = 25OC if not otherwise noted)

Symbol

Parameter

Supply Voltage (VDD)

I_VDD_Startup VDD Start up

Current

I_VDD_Ops

Operation Current

UVLO(ON)

VDD Under Voltage Lockout Enter

UVLO(OFF) VDD Under Voltage Lockout Exit

(Recovery)

VDD_Clamp VDD Zener Clamp Voltage

Feedback Input Section(FB Pin)

AVCS

PWM Input Gain

VFB_Open

IFB_Short

VFB Open Loop Voltage

FB pin short circuit current

Test Conditions

VDD =12.5V, RI=100K

Measure Leakage

current into VDD

VDD=16V,

RI=100Kohm, VFB=3V

IVDD = 5 mA

ΔVFB /ΔVcs

Short FB pin to GND

and measure current

Min Typ Max Unit

3

20 uA

1.4

mA

7.5 8.5 9.5 V

13.5 14.5 15.5 V

34

V

2.0

V/V

4.8

V

1

mA

4

Advanced Monolithic Systems http://www.ams-semitech.com

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