UC2878L

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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中文翻译

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数据手册

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UC2878L 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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与UC2878L相关器件

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UC2878N	TI	获取价格	Phase Shift Resonant Controller
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UC2879DW	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC2879DWG4	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC2879DWTR	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC2879DWTRG4	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC2879J	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC2879L	ETC	获取价格	Current/Voltage-Mode SMPS Controller