UC2876N

更新时间： 2024-11-02 08:26:23

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
19页	740K
描述
Phase Shift Resonant Controller

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UC2876N 数据手册

application

INFO

UC1875/6/7/8

UC2875/6/7/8

UC3875/6/7/8

available

Phase Shift Resonant Controller

FEATURES

DESCRIPTION

• Zero to 100% Duty Cycle Control

The UC1875 family of integrated circuits implements control of a bridge

power stage by phase-shifting the switching of one half-bridge with respect

to the other, allowing constant frequency pulse-width modulation in combi-

nation with resonant, zero-voltage switching for high efficiency performance

at high frequencies. This family of circuits may be configured to provide

control in either voltage or current mode operation, with a separate

over-current shutdown for fast fault protection.

• Programmable Output Turn-On Delay

• Compatible with Voltage or Current

Mode Topologies

• Practical Operation at Switching

Frequencies to 1MHz

A programmable time delay is provided to insert a dead-time at the turn-on

of each output stage. This delay, providing time to allow the resonant

switching action, is independently controllable for each output pair (A-B,

C-D).

• Four 2A Totem Pole Outputs

• 10MHz Error Amplifier

• Undervoltage Lockout

With the oscillator capable of operation at frequencies in excess of 2MHz,

overall switching frequencies to 1MHz are practical. In addition to the stan-

dard free running mode, with the CLOCKSYNC pin, the user may configure

these devices to accept an external clock synchronization signal, or may

lock together up to 5 units with the operational frequency determined by

the fastest device.

• Low Startup Current –150µA

• Outputs Active Low During UVLO

• Soft-Start Control

• Latched Over-Current Comparator

With Full Cycle Restart

Protective features include an undervoltage lockout which maintains all out-

puts in an active-low state until the supply reaches a 10.75V threshold.

1.5V hysteresis is built in for reliable, boot-strapped chip supply.

Over-current protection is provided, and will latch the outputs in the OFF

state within 70nsec of a fault. The current-fault circuitry implements

• Trimmed Reference

full-cycle restart operation.

(continued)

BLOCK DIAGRAM

UDG-95073

SLUS229B - JULY 1999 - REVISED JUNE 2004

12 3 4 5 6 7...19

中文翻译

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UC2876N 替代型号

型号	品牌	替代类型	描述	数据表
UC3876NG4	TI	完全替代	3A SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDIP20, GREEN, PLASTIC, DIP-20
UC3876N	TI	功能相似	Phase Shift Resonant Controller

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