RT8841 데이터 시트보기 (PDF) - Richtek Technology

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RT8841

4/3/2/1-Phase PWM Controller for High-Density Power Supply

Richtek Technology 

RT8841

Typical Operating Characteristics

Frequency vs. RRT

1200

1000

800

600

400

200

0

0

40

80 120 160 200 240 280

RRT (k Ωoh) m)

1.324

Output Voltage vs. Temperature

1.323

1.322

1.321

1.320

1.319

1.318

1.317

1.316

1.315

1.314

VIN = 12V, IOUT = 0A

-40 -20 0 20 40 60 80 100 120 140

Temperature

Frequency vs. Temperature

380

RRT = 30.1kΩ

375

370

365

360

355

350

345

-40 -20 0 20 40 60 80 100 120 140

Temperature (°C)

Power Off from VTT/EN

VOUT

(1V/Div)

VTT/EN

(1V/Div)

PGOOD

(1V/Div)

PHASE

(10V/Div)

Power On from VTT/EN

VIN = 12V, VOUT = 1.4V, IOUT = 0A

Time (2ms/Div)

Power On from VIN

VOUT

(1V/Div)

VTT/EN

(1V/Div)

SS

(2V/Div)

PHASE

(10V/Div)

VIN = 12V, VOUT = 1.4V, IOUT = 0A

Time (40us/Div)

Copyright ©2014 Richtek Technology Corporation. All rights reserved.

www.richtek.com

22

VOUT

(1V/Div)

VIN

(10V/Div)

PGOOD

(2V/Div)

PHASE

(10V/Div)

VIN = 12V, VOUT = 1.4V, IOUT = 0A

Time (4ms/Div)

is a registered trademark of Richtek Technology Corporation.

DS8841-02 August 2014

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