CS1107 CHERRY | Alldatasheet

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Technical content

Features

& Bias Fault 33V n Fault Detection Open Circuit Short Circuit Overtemperature n On-Chip Flyback Protection n Low Standby Current Package Options CS1107 Single Relay Driver IC CS1107

Description

This ASIC provides up to 350mA of drive current for driving a relay. On-chip diagnostic features include open and short circuit detection in the on state, duty cycle current limit control, and thermal shutdown. Faults are reported on the lead. is an active-low output. An on-chip zener provides protec- tion from flyback pulses from the relay. Internal pull-down circuitry is provided to ensure the output pin turns off when the Control pin is floating. Fault Fault Block Diagram Absolute Maximum Ratings Peak Transient Voltage (output off mode, output pin only) (26V load Dump @ 14V V Lead Temperature Soldering Fault Output 1 VCC Gnd GndControl Gnd GndFault

8 Lead SO

(internally fused leads)

1 A Company ¨

Rev. 1/29/99 Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com

Electrical Characteristics: 4.75V ² VCC ² 5.25V, -40ûC ² TA ² 85ûC, -40¡C ² TJ ² 150¡C CS1107 Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION PARAMETER TEST CONDITIONS MIN TYP MAX UNIT (Internally Fused Leads) 1 Output Open collector output. CC 5V regulated supply input.

3 Open collector diagnostic output low during open

load, short circuit and overtemperature conditions. 4 Control TTL compatible input. A high on this pin turns the output on. 5, 6, 7, 8 Ground Signal ground. Fault n Supply Requirements VCC Quiescent Current Output ON 3 6 mA VCC Quiescent Current Output OFF 70 250 µA n Output Leakage Current V BAT =14V 0 100 µA Saturation Voltage I OUTPUT = 350mA 1.1 1.5 V I OUTPUT = 180mA 0.9 1.3 V VCLAMP VCC < 4.5V, I OUTPUT = 180mA 29 33 36 V n Current Sense Short Circuit Current 350 500 650 mA Open Circuit Current Output in the ON state 20 40 60 mA n Control - Input Input Voltage Logic = High 2.0 V Logic = Low 0.8 V Input Current Control = V CC 40 80 µA n Fault Output - (Open Collector) Output Low Voltage I FAULT = 250µA (sink) 0.24 0.40 V n Overtemperature Shutdown TJ Output Disable Threshold (Guaranteed by Design) 150 180 ûC TJ Hysteresis (Guaranteed by Design) 5 ûC

CMODULE(ESD) Applications Diagram Circuit Description The CS1107 relay driver IC provides up to 350mA of drive current in a low-side configuration. The Output driver pin is controlled through the TTL compatible Control input pin. A high condition on the Control pin turns the output pin on. The pin reports short circuit, open circuit, and overtemperature conditions on the IC. If a fault is present, the open collector output pin will be low. Typical numbers for faults are: exceeding 500mA of drive current will report a short circuit. Less than 40mA (typical) will report an open circuit. A temperature fault will be reported when the die temperature exceeds 180¡C (typical). Faults are only reported when the Control pin is high, due to the low quiescent current when the Control pin is low and the output device is turned off. Overcurrent protection is provided by duty cycle control. When the Output current exceeds the current limit thresh- old, the output enters duty cycle mode to reduce power dissipation of the IC to a safe level. The higher the thresh- old is exceeded the lower the duty cycle becomes. A 33V on-chip zener diode on the Output pin protects the device from flyback pulses when a relay is turned off. The saturation voltage of this pin will not exceed 1.5V at 350mA. Fault Fault

(internally fused leads) RQJC typ 25 ûC/W RQJA typ 110 ûC/W 4Rev. 1/29/99 © 1999 Cherry Semiconductor Corporation Package Specification PACKAGE DIMENSIONS IN mm (INCHES) D Lead Count Metric English Max Min Max Min 8 Lead SO 5.00 4.80 .197 .189 PACKAGE THERMAL DATA CS1107

Ordering Information

(internally fused leads) CS1107EDFR8 8 Lead SO (internally fused leads) (tape & reel) Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. Surface Mount Narrow Body (D); 150 mil wide 0.33 (.013) 6.20 (.244) 5.80 (.228) 4.00 (.157) 3.80 (.150) 1.57 (.062) 1.37 (.054) D 0.25 (0.10) 0.10 (.004) 1.75 (.069) MAX 1.27 (.050) 0.40 (.016) REF: JEDEC MS-012 0.25 (.010) 0.19 (.008)