Datasheet > UC3849BL-D08-T

UC3849BL-D08-T

更新时间： 2024-11-24 02:51:19

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
10页	304K
描述
LOW COST POWER-SAVING MODE PWM CONTROLLER

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UC3849BL-D08-T 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3849B

LINEAR INTEGRATED CIRCUIT

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UC3849B is a high performance current mode PWM

controller ideally suited for low standby power. Low V_DDstartup

current make the power reliable on startup design and a large

value resistor could be used in the startup circuit to minimize the

standby power. At no load condition, the IC operates in

power-saving mode for lower standby power, decreasing frequency

for Higher conversion efficiency at light load condition.

The UC3849B contains protection with automatic recovery

including OLP (over load protection), programming OTP (over

temperature protection), OVP (over voltage protection), UVLO (V_DDover voltage clamp and under voltage

lockout).To protect the power MOSFET, Gate-drive output is fixed up to 16V max. The UC3849B contains protection

OCP (cycle-by-cycle current limiting).

The internal slope compensation improves system stability at high PWM duty cycle output. Leading-edge

blanking on current sense input removes the signal glitch, which offering minimal external component count in the

design. Excellent EMI performance is achieved with UTC proprietary frequency hopping technique

(ZL201020615247.1) together with soft driver control. Audio noise is eliminated due to switch frequency more than

20kHz during operation.

The UC3849B has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet

printers, open-frame SMPS.



FEATURES

* UTC proprietary frequency hopping technology for Improved EMI * Programming OTP for higher security

performance.

* Fixed switch frequency 65kHz

* Gate output voltage clamped at 15V

* Low start-up current

* Power-saving mode for high light-load and standby efficiency

* Soft Start

* Dynamic peak current limiting for constant output power

* Built-in synchronized slope compensation

* OLP,OVP and V_DDclamp for higher security

* Cycle-by-cycle Current Limiting

* Under voltage lockout (UVLO)

* Few external components required



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3849BL-D08-T

UC3849BL-S08-R

UC3849BG-D08-T

UC3849BG-S08-R

DIP-8

Tube

SOP-8

Tape Reel

UC3849BG-D08-T

(1) R: Tape Reel, T: Tube

(2) D08: DIP-8, S08: SOP-8

(1)Packing Type

(2)Package Type

(3)Green Package

(3) G: Halogen Free and Lead Free, L: Lead Free

www.unisonic.com.tw

1 of 10

QW-R103-153.A

12 3 4 5 6 7...10

中文翻译

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与UC3849BL-D08-T相关器件

型号	品牌	获取价格	描述	数据表
UC3849BL-S08-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3849DW	TI	获取价格	0.3A SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO24, GREEN, PLASTIC, SOIC-24
UC3849DWTR	TI	获取价格	0.3A SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO24, GREEN, PLASTIC, SOIC-24
UC3849DWTRG4	TI	获取价格	0.3A SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO24, GREEN, PLASTIC, SOIC-24
UC3849J	ETC	获取价格	Analog IC
UC3849N	ETC	获取价格	Current-Mode SMPS Controller
UC3849NG4	TI	获取价格	IC 0.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDIP24, PLASTIC, DIP-24, Switc
UC3849PW	ETC	获取价格	Current-Mode SMPS Controller
UC3849PWTR	ETC	获取价格	Current-Mode SMPS Controller
UC3849Q	ETC	获取价格	Current-Mode SMPS Controller

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