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UC1702_08

更新时间： 2024-11-09 02:58:35

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UC1702_08 数据手册

UC1702

UC2702

UC3702

Quad PWM Relay Driver

FEATURES

DESCRIPTION

• Maintains Constant Average

Relay Voltage With Varying

Supply Voltages

The UC3702 Quad Relay Driver is intended to drive up to four relays from

logic inputs using an unregulated relay voltage supply. The relays are

driven from the Bus supply in a power efficient PWM converter fashion.

The relay coil is used as the inductive element. (See the application's sec-

tion concerning the relay selection.) VBUS must be higher then the rated

relay voltage. Short circuit protection is provided on chip with periodic retry.

• VBUS Voltages up to 42.5V

• Up to 50mA per Relay

• Integrated Schottky Flyback Diodes

• Individual Relay Control Inputs

• Short Circuit Protection

The UC3702 requires a +5V logic supply as a reference. Two external re-

sistors program the effective relay voltage and a capacitor sets the nominal

operating frequency. Internal Schottky diodes eliminate the need for any

external power components.

In typical applications, the UC3702 grants the user the flexibility to choose

the most cost effective relay without the added burden of generating a sep-

arate relay supply voltage. The UC3702 will even function with a poorly

regulated supply VBUS, containing significant 100Hz or 120Hz ripple.

• User Selectable Operating Center

Frequency and Relay Voltage

• Global Reset

BLOCK DIAGRAM

UDG-96009-1

SLUS368 - APRIL 1997

12 3 4

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型号	品牌	获取价格	描述	数据表
UC1702D	TI	获取价格	0.175A 4 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDSO16, 0.150 INCH, PLASTIC, SOIC-16
UC1702J	TI	获取价格	0.175A 4 CHANNEL, PWM BASED PRPHL DRVR, CDIP16, CERAMIC, DIP-16
UC1702N	TI	获取价格	0.175A 4 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDIP16, PLASTIC, DIP-16
UC1705	TI	获取价格	High Speed Power Driver
UC1705D	TI	获取价格	High Speed Power Driver
UC1705J	TI	获取价格	High Speed Power Driver
UC1705J883B	TI	获取价格	High Speed Power Driver
UC1705JQMLV	TI	获取价格	1A BUF OR INV BASED MOSFET DRIVER, CDIP8, HERMETIC SEALED, CERAMIC, DIP-8
UC1705L883B	TI	获取价格	High Speed Power Driver
UC1705N	TI	获取价格	High Speed Power Driver