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| CS1107 CS1107 Single Relay Driver IC 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 Fault lead. Fault is an active-low output. An on-chip zener provides protection 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. Features s Fault Detection Open Circuit Short Circuit Overtemperature s On-Chip Flyback Protection s Low Standby Current Absolute Maximum Ratings Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65uC to 150uC VCC, Fault , Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 6V ESD Capability (Human Body Model). . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV Peak Transient Voltage (output off mode, output pin only) (26V load Dump @ 14V VBAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40V Lead Temperature Soldering Reflow (SMD styles only) . . . . 60 sec. max above 183C, 230C peak Block Diagram VCC Control ISOURCE Output 33V Drive & Bias Package Options 8 Lead SO (internally fused leads) Output VCC 1 Overtemp Shutdown Duty cycle during short circuit + Fault + short circuit detect open circuit detect Gnd Gnd Gnd Gnd Fault Control Gnd Gnd Gnd Gnd 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 Rev. 1/29/99 1 A Company CS1107 Electrical Characteristics: 4.75V VCC 5.25V, -40uC TA 85uC, -40C TJ 150C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT s Supply Requirements VCC Quiescent Current VCC Quiescent Current s Output Leakage Current Saturation Voltage VCLAMP s Current Sense Short Circuit Current Open Circuit Current s Control - Input Input Voltage Input Current Output ON Output OFF 3 70 6 250 mA A VBAT =14V I OUTPUT = 350mA I OUTPUT = 180mA VCC < 4.5V, I OUTPUT = 180mA 29 0 1.1 0.9 33 100 1.5 1.3 36 A V V V Output in the ON state 350 20 500 40 650 60 mA mA Logic = High Logic = Low Control = VCC 2.0 40 0.8 80 V V A s Fault Output - (Open Collector) Output Low Voltage I FAULT = 250A (sink) s Overtemperature Shutdown TJ Output Disable Threshold TJ Hysteresis 0.24 0.40 V (Guaranteed by Design) (Guaranteed by Design) 150 5 180 uC uC Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION 8 Lead SO (Internally Fused Leads) 1 2 3 4 5, 6, 7, 8 Output VCC Fault Control Ground Open collector output. 5V regulated supply input. Open collector diagnostic output low during open load, short circuit and overtemperature conditions. TTL compatible input. A high on this pin turns the output on. Signal ground. 2 CS1107 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 Fault pin reports short circuit, open circuit, and overtemperature conditions on the IC. If a fault is present, the open collector output Fault 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 180C (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 threshold, the output enters duty cycle mode to reduce power dissipation of the IC to a safe level. The higher the threshold 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. Applications Diagram Output CMODULE(ESD) 10nF CS1107 VCC Fault 20k Control VBAT VCC Gnd Gnd Gnd Gnd microprocessor 3 CS1107 Package Specification PACKAGE DIMENSIONS IN mm (INCHES) PACKAGE THERMAL DATA D Lead Count 8 Lead SO Metric Max Min 5.00 4.80 English Max Min .197 .189 Thermal Data RQJC RQJA typ typ 8 Lead SO (internally fused leads) 25 110 uC/W uC/W Surface Mount Narrow Body (D); 150 mil wide 4.00 (.157) 3.80 (.150) 6.20 (.244) 5.80 (.228) 0.51 (.020) 0.33 (.013) 1.27 (.050) BSC 1.75 (.069) MAX 1.57 (.062) 1.37 (.054) 1.27 (.050) 0.40 (.016) 0.25 (.010) 0.19 (.008) D REF: JEDEC MS-012 0.25 (0.10) 0.10 (.004) Ordering Information Part Number CS1107EDF8 CS1107EDFR8 Description 8 Lead SO (internally fused leads) 8 Lead SO (internally fused leads) (tape & reel) 4 Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. (c) 1999 Cherry Semiconductor Corporation Rev. 1/29/99 |
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