XC9119D10A 데이터 시트보기 (PDF) - TOREX SEMICONDUCTOR

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XC9119D10A

1MHz, PWM Controlled, Step-Up DC/DC Converter, Ceramic Capacitor Compatible

TOREX SEMICONDUCTOR 

XC9119D10A Series

■TEST CIRCUITS

Circuit ①

CIN

VIN

4.7uF

(ceramic)

VCE

L:22uH

SD

CDRH4D18C XB01SB04A2BR

VOUT

VDD

CE/SS

VSS

Lx CFB

1000pF

(ceramic)

FB

V

RFB1

300kΩ

CL

4.7uF

(ceramic)

RFB2

75kΩ

V

RL

Circuit ②

OSC

A

VIN

Rpull

Lx

CE

FB

220uF

VIN

VSS

1uF

VCE

VFB

Circuit ③

VIN

Vpull

A

VIN

Lx

A CE

FB A

VSS

1uF

VCE

VFB

A

VLx

Circuit ④

OSC

10 Ω 300Ω

100uF/16V

(OS capacitor)

10V

VIN

Lx

R2

CE

FB

4.3kΩ

Vpull

VIN

4.7uF/10V

VSS

(ceramic)

VCE

2SK583

R1

1.1kΩ

V

0.01uF

(ceramic)

47uF/25V

(OS capacitor)

1. The measurement method of Lx On resistance RSWON

Using the circuit ②, Lx On resistance can be measured by adjusting Vpull voltage to set Lx voltage VLx x 0.4V when the

driver transistor is ON. The oscilloscope is used for measuring the Lx voltage when the driver transistor is ON.

RSWON = 0.4 / {(Vpull – 0.4) / 10}

2. The measurement method of current limit ILIM

Using the circuit ④, current limit ILIM can be calculate by the equation including Vpull voltage when FB voltage is

decreased while Vpull voltage is adjusted and Lx voltage VLx when the driver transistor is ON. The oscilloscope is used

for measuring the Lx voltage when the driver transistor is ON.

ILIM=(Vpull – VLx) / Rpull

8/18

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