Datasheet > UC3877QPTR

UC3877QPTR

更新时间： 2024-11-24 23:38:59

品牌	Logo	应用领域
其他 - ETC		开关控制器
页数	文件大小	规格书
12页	550K
描述
Voltage-Mode SMPS Controller

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC3877QPTR 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

full-cycle restart operation.

• Trimmed Reference

BLOCK DIAGRAM

UDG-95073

07/99

12 3 4 5 6 7...12

中文翻译

下载PDF

与UC3877QPTR相关器件

型号	品牌	获取价格	描述	数据表
UC3878	TI	获取价格	Phase Shift Resonant Controller
UC3878DWP	TI	获取价格	Phase Shift Resonant Controller
UC3878DWPG4	TI	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,BIPOLAR,SOP,28PIN,PLASTIC
UC3878DWPTR	ETC	获取价格	Voltage-Mode SMPS Controller
UC3878DWPTRG4	TI	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,BIPOLAR,SOP,28PIN,PLASTIC
UC3878J	TI	获取价格	Phase Shift Resonant Controller
UC3878L	TI	获取价格	Phase Shift Resonant Controller
UC3878N	TI	获取价格	Phase Shift Resonant Controller
UC3878QP	TI	获取价格	Phase Shift Resonant Controller
UC3878QPTR	ETC	获取价格	Voltage-Mode SMPS Controller