UC2825

활성

향상된 30V, 1.5A 더블 종단 1MHz PWM 컨트롤러, 9.2V/8.4V UVLO, 80% 듀티 사이클, -40C~85C

지금 주문

데이터시트

document-pdfAcrobat High Speed PWM Controller datasheet (Rev. A) (영어)

UC2825

활성

데이터시트

지금 주문

제품 상세 정보

Vin (max) (V)

12

Operating temperature range (°C)

-40 to 85

Control mode

Current, Feedforward

Topology

Boost, Flyback, Forward, Full bridge, Half bridge, Push pull

Rating

Catalog

Duty cycle (max) (%)

80

Vin (max) (V)

12

Operating temperature range (°C)

-40 to 85

Control mode

Current, Feedforward

Topology

Boost, Flyback, Forward, Full bridge, Half bridge, Push pull

Rating

Catalog

Duty cycle (max) (%)

80

PDIP (N)

16

181.42 mm² 19.3 x 9.4

SOIC (DW)

16

106.09 mm² 10.3 x 10.3

Compatible with Voltage or Current Mode Topologies
Practical Operation Switching Frequencies to 1MHz
50ns Propagation Delay to Output
High Current Dual Totem Pole Outputs (1.5A Peak)
Wide Bandwidth Error Amplifier
Fully Latched Logic with Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Soft Start / Max. Duty Cycle Control
Under-Voltage Lockout with Hysteresis
Low Start Up Current (1.1mA)

Compatible with Voltage or Current Mode Topologies
Practical Operation Switching Frequencies to 1MHz
50ns Propagation Delay to Output
High Current Dual Totem Pole Outputs (1.5A Peak)
Wide Bandwidth Error Amplifier
Fully Latched Logic with Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Soft Start / Max. Duty Cycle Control
Under-Voltage Lockout with Hysteresis
Low Start Up Current (1.1mA)

The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

These devices feature totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on state is designed as a high level.

The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

These devices feature totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on state is designed as a high level.

filter

기타 AC/DC 및 DC/DC 컨트롤러(외장 FET) 찾기

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new

대안 비교

비교 대상 장치와 유사한 기능

TL494

활성

40V, 0.2A 300KHz PWM 컨트롤러 Supports push-pull topology

기술 문서

star

=TI에서 선정한 이 제품의 인기 문서

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모두 보기3

	유형	직함	날짜
*	Data sheet	High Speed PWM Controller datasheet (Rev. A)	2004/02/24
	Application note	Qualifier TJ = TA Defined	2010/11/03
	Application note	U-110 1.5 Mhz Current Mode IC Controlled 50-Watt Power Supply	1999/09/05