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SC4502EVB

更新时间： 2024-11-20 09:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		调节器开关软启动
页数	文件大小	规格书
19页	407K
描述
1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start

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SC4502EVB 数据手册

SC4502/SC4502H

1.4Amp, 2MHz Step-Up Switching

Regulator with Soft-Start

POWER MANAGEMENT

Features

Description

The SC4502/SC4502H is a high-frequency current-mode Low saturation voltage switch: 210mV

step-up switching regulator with an integrated 1.4A

(250mV for the SC4502H)

power transistor. Its high switching frequency (program- Constant switching frequency current-mode control

mable up to 2MHz) allows the use of tiny surface-mount Programmable switching frequency up to 2MHz

external passive components. Programmable soft-start Soft-Start function

eliminates high inrush current during start-up. The inter- Input voltage ranges from 1.4V to 16V

nal switch is rated at 32V (40V for the SC4502H) mak- Output voltage up to 32V (40V for the SC4502H)

ing the converter suitable for high voltage applications Low shutdown current

such as Boost, SEPIC and Flyback.

Adjustable undervoltage lockout threshold

Small low-profile thermally enhanced lead free

package. This product is fully WEEE and RoHS

compliant.

The operating frequency of the SC4502/SC4502H can

be set with an external resistor. The ability to set the

operating frequency gives the SC4502/SC4502H design

flexibilities. A dedicated COMP pin allows optimization of

the loop response. The SC4502/SC4502H is available

in thermally enhanced 10-pin MLPD package.

Applications

Flat screen LCD bias supplies

TFT bias supplies

XDSL power supplies

Medical equipment

Digital video cameras

Portables devices

White LED power supplies

Typical Application Circuit

VIN

VOUT

12V

10BQ015

Efficiency

6,7

866K

SHDN

SC4502

10.5 H, 700KHz

H, 1.4MHz

5.3µ

OFF ON

2.2µF

10µF

GND

4,5

COMP

ROSC

100K

47nF

H, 2MHz

3.3µ

All Capacitors are Ceramic.

V_IN= 5V

V_OUT= 12V

f (MHz) R₃(KΩ) R₄(KΩ) C₄(pF) C₆(pF)

L₁(µH)

0.0

0.1

0.2

0.3

0.4

0.5

0.7

1.4

33.2

59.0

73.2

23.7

9.53

5.36

1500

560

10.5 (Falco D08019)

5.3 (Sumida CDRH5D28)

3.3 (Coilcraft DO1813P)

Load Current (A)

330

Figure 1(b). Efficiencies of 5V to 12V Boost Converters at

700KHz, 1.4MHz and 2MHz.

Figure 1(a). 5V to 12V Boost Converter.

Revision: July 25, 2005

www.semtech.com

12 3 4 5 6 7...19

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与SC4502EVB相关器件

型号	品牌	获取价格	描述	数据表
SC4502H	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502HEVB	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502HMLTRT	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502MLTRT	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4503	SEMTECH	获取价格	1.3MHz Step-Up Switching Regulator with 1.4A Switch
SC4503EVB	SEMTECH	获取价格	1.3MHz Step-Up Switching Regulator with 1.4A Switch
SC4503TSKTRT	SEMTECH	获取价格	1.3MHz Step-Up Switching Regulator with 1.4A Switch
SC4505	SEMTECH	获取价格	High Efficiency Boost Converter for Backlight/Flash LED Driver
SC4505_07	SEMTECH	获取价格	High Efficiency Boost Converter for Backlight/Flash LED Driver
SC4505EVB	SEMTECH	获取价格	High Efficiency Boost Converter for Backlight/Flash LED Driver

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