AT1730P-GRE [ETC]

2-Channel PWM Controller for LCD Bias; 2通道PWM控制器，用于LCD偏置


型号：	AT1730P-GRE
厂家：	ETC
描述：	2-Channel PWM Controller for LCD Bias 2通道PWM控制器，用于LCD偏置控制器 CD
文件：	总7页 (文件大小：262K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Features

General Description

• Low input voltage: 2.4V to 6V

• 2-Channels PWM Control:

The AT1730 is a PWM DC/DC converter control

IC with 2 channel outputs that can directly drive

power MOSFET. This IC ia suitable for very small

DC/DC converters because of their small and thin

package(1.1 mm max.), and high operation

frequency (up to 1.0MHz).

Nch-MOSFET driving(CH1)

Nch/Pch-MOSFET driving(CH2)

• Adjustable Soft start time and maximum duty

cycle

• Built-in timer latch for short circuit protection:

• Built-in under-voltage lockout

• High operating frequency: 100kHz to 1.0MHz

• Low operating current: 2mA (typ.)

Applications

• LCD Displays Bias

• Power Supply for general equipment

Block Diagram

Aimtron reserves the right without notice to change this circuitry and specifications.

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Pin Configuration

Ordering Information

Part number

Package

Marking

AT1730P

TSSOP16

TSSOP16, Green

AT1730P, Date Code with one bottom line

AT1730P GRE

Pin Description

Symbol Pin No.

Descript

ON/OFF Function

Symbol

OUT1

Pin No.

Descript

CH1 output for Nch-

MOSFET

/SHDN

IN2+

IN2-

CH2 non-inverting input to CS1

error amplifier

Soft-star for CH1

CH2 inverting input to VCC

error amplifier

Power Supply

FB2

SEL

CH2 error amplifier output VREF

Selection of type of driven FB1

MOSFET

Regulated voltage output

CH1 error amplifier output

GND

CS2

Ground

IN1-

CH1 inverting input to

error amplifier

Soft-Start for CH2

SCP

Timing capacitor for timer

latch delay

OUT2

CH2 Output for Nch or Pch OSC

Oscillator timing capacitor

MOSFET

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Absolute Maximum Ratings

Parameter

Condition

Rated Value

Unit

Min.

Max.

Power Supply Voltage

—

Source Average Current of OUT1

OUT2, OUT3

-50

Sink Average Current of OUT1

OUT2, OUT3

—

Output current of VREG

Input Voltage to Error Amplifier

—

6.5

500

+85

+125

+150

+300

Continuous power dissipation

TSSOP16（T =+25℃）

Operating temperature

Junction temperature

Storage temperature

Lead temperature

—

-30

⁰C

-40

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are

stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended

periods may affect device reliability.

Recommended Operating Conditions

(Ta=+25⁰C)

Parameter

Symbol

Values

Typ.

Unit

Min.

Max.

Power supply voltage

Oscillation frequency

Operating temperature

V_CC

f_OSC

T_OP

2.4

100

-10

5.5

1000

+85

Ｖ

KHz

°C

500

+25

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Electrical Characteristics

(VCC = 3V,T =+25℃, unless otherwise noted.)

Parameter

Symbol

Condition

Values

Unit

Min. Typ. Max.

Input Supply Range

2.4

5.5

V_CC

VCC

Undervoltage

UVLO

V_TH1/2

2.00 2.20 2.35

0.98 1.00 1.02

Lockout

EA Reference Voltage

line-regulation

VCC=2.5V to 5.5

Entire device

V_TH-Line

0.5

10 mV

EA Rference Variation

with Temperature

T =-10℃ to +85℃

ON/OFF=GND

μA

Standby current

Operating Current

Input Offset Voltage

Source Current

Sink Current

I_CCS

I_CC

V_CS2= V_CS2=0V

IN=FB

1.0 2.0 mA

V_IO

I_FBH

I_FBL

10 mV

μA

V_FB= V_REG-0.5V

V_FB= 0.5V

-160 -120 -70

2.0 2.5 3.0 mA

Source current Variation

with temperature

T =-10℃ to +85℃

Error amplifier

Sink current Variation

with temperature

T =-10℃ to +85℃

Unity Gain Bandwidth

f_T

1.6

MHz

Common Mode Input

Voltage Range

Vcc-

0.4

V_COM

A_V

DC Open Loop Gain

100

kHz

C_T=100pF

430 490 580

Frequency

fosc

C_T=100pF

1.016

0.396

High Level Voltage

Low Level Voltage

C_T=100pF

Sawtooth wave

Oscillator (OSC)

Variation with Power

Supply

Variation with

temperature

Vcc=2.5V to 5.5V

T =-10℃ to +85℃

Regulated Voltage

for internal Control

Block

I_REG=no load

Regulated Voltage

Line Regulator

Load Regulator

V_REF

2.16 2.20 2.24

Vcc=2.5V to 5.5V

_REG=0~1mA

V_REF-line

V_REF-load

20 mV

-20

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Variation with

Temperature

T =-10℃ to +85℃

1.5

Threshold voltage of

Duty Cycle=0%

V_{CS1/2 0}

V_{CS1/2 100}

V_CPTH

V_FBTL

I_CP

0.38 0.39 0.40

0.96 1.01 1.06

CS1/2

Soft-Start and Duty

Section

Threshold voltage of

CS1/2

Duty Cycle=100%

Threshold Voltage of

1.00

1.22

Timer Latch Section

(TL)

Threshold Voltage of

FB1/2

V_CP=V_REG-0.5V

μA

0.75 1.25 1.75

Charge Current of CP

Rise time of OUT1,2

Fall time of OUT1,2

C_O=1000pF between

OUT1,2-GND

t_{r1_2}

Ω

Output Section

C_O=1000pF between

OUT1,2-GND

t_{f1_2}

High Level on

I_{OUT1_2}=-50mA

R_{1_2AH}

R_{1_2AL}

V_ONH

11.5 14

Resistance of OUT1,2

Low Level on

I_{OUT1_2}=50mA

8.5

2.0

Resistance of OUT1,2

On/OFF Section

Active mode Threshold

Disable mode Threshold V_ONL

0.8

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Typical Application Circuit

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730

Preliminary Product Information

2-Channel PWM Controller for LCD Bias

Package Outline 16-pin TSSOP

MILLIMETERS

INCHES

TYP

SYMBOL

MIN

TYP

MAX

MIN

MAX

1.05

0.05

1.10

0.10

1.00

0.25

0.127

5.075

6.40

4.40

0.60

0.65

1.20

0.15

1.05

0.28

0.041

0.002

0.043

0.004

0.039

0.010

0.005

0.1998

0.252

0.173

0.024

0.026

0.047

0.006

0.041

0.011

0.20

0.008

4.90

6.20

4.30

0.50

5.10

6.60

4.50

0.70

0.193

0.244

0.170

0.020

0.200

0.260

0.177

0.028

0°

0.076

8°

0°

0.003

8°

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

AT1730P-GRE [ETC]

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