sc1437 Semtech Corporation, sc1437 Datasheet
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sc1437
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sc1437 Summary of contents
Page 1
... POWER MANAGEMENT Description The SC1437 is a battery over voltage detection circuit with driver for external MOSFET. The trip point is adjustable with an external resistor divider connected to the SENSE pin. The trip point is preset to a nominal trip voltage of 4. external divider is used. Other internal trip voltages of 4.5V and 4.7V are available, specified by different part numbers ...
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... www.semtech.com SC1437 ° ° C ° C ° C ° µ ...
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... POWER MANAGEMENT Pin Configuration Top View SEL SOT-23-5L Marking Information Top Mark 7B45 7 = SC1437 Device Output Option Output active low L = Output active high H = Output active high, with open drain Voltage Option 4.2V 4.5V 4.7V Pin Descriptions ...
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... POWER MANAGEMENT Block Diagram V+ SENSE * Based on version selected 4.2V, 4.5V, 4. option: Output active low L option: Output active high H option: Output active high, open drain 2000 Semtech Corp. V+ COMPARATOR 6.8V CLAMP MUX V+ DELAY TIMER SEL 4 SC1437 V+ 4.2V DRIVER OV V- www.semtech.com ...
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... JP2, JP3 or leaving the jumper off, respectively. Configuration of timing delays are shown in Table 1. Once the trip delay is set to the required value the SC1437 will monitor the charger voltage. If the charger voltage equals or exceeds 5.5V the OV pin will transition from high to low (Version B) turning Q1 off, thereby breaking the circuit and protecting the battery from overvoltage ...
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... SC1437 1 CHARGER+ R3 100 SEL SENSE SC1437 C1 0.1uF 1 rip delay Se rip dela rip dela Set 40mS, JP2 Shor o 40mS, JP2 Shor o 40mS, JP2 Short ed. o 40mS, JP2 Shor rip dela 40mS, JP2 Shor www ...
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... Against T Plo Plo ed A INTERNAL TRIP VOLTAGE DEVIATION OVER TEMPERATURE 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -40 - TEMPERATURE (Degrees C) 7 SC1437 rip V rip V oltage (4.7V) De oltage (4.7V) De viation viation rip V rip Voltage (4.7V) De oltage (4.7V) Deviation oltage (4.7V) De viation viation gainst T gainst T gainst T gainst Tem em emperature perature. perature. ...
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... POWER MANAGEMENT Outline Drawing - SOT23-5 Land Pattern - SOT23-5 Contact Information 2000 Semtech Corp. Semtech Corporation Power Management Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804 8 SC1437 www.semtech.com ...