DatasheetsPDF.com

SC1437

Semtech Corporation
Part Number SC1437
Manufacturer Semtech Corporation
Description Precision Voltage Detector With Programmable Trigger Voltage & Timer Delay
Published Apr 8, 2005
Detailed Description Precision Voltage Detector With Programmable Trigger Voltage & Timer Delay POWER MANAGEMENT Description The SC1437 is a ...
Datasheet PDF File SC1437 PDF File

SC1437
SC1437

Overview
Precision Voltage Detector With Programmable Trigger Voltage & Timer Delay 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.
2V if no external divider is used.
Other internal trip voltages of 4.
5V and 4.
7V are available, specified by different part numbers.
An internal delay, with two selectable times or bypass, is on-board to suppress accidental over voltage conditions due to glitches on the battery supply voltage, V+.
The delay is externally adjustable by pulling the SEL pin high, low, or left floating.
During an actual over voltage condition, the internal driver will pull the over voltage pin (OV) down to the voltage present at the V- pin.
This insures the external N-Channel MOSFET will be completely off during an over voltage condition.
Supply current during the monitoring mode of operation is approximately 10µA.
If an over voltage condition is detected, supply currents increase when the timer is started.
A voltage comparator will engage at voltages greater than 6.
8V, which bypasses the timer and open circuits the battery by turning off the external MOSFET.
This important function protects the battery during the timer delay in the event of a charger failure.
There are three functional options available.
With the B option the OV pin is active low.
With the L option the OV pin is active high.
With the H option the OV pin is open drain, active high.
All options are available in a 5 lead SOT-23 package.
SC1437 Features Low quiescent current, less than 10µA typical Input voltage range 1.
8V to 6.
8V Adjustable or preset voltage trip point Selectable timer delays of 0, 40 and 80ms without use of external resistor ! SOT-23 5 lead package ! Accuracy is 2% over specified temperature range ! 30V maximum rating ! ! ! ! Applications ! ! ! ! ! ! Battery packs Port...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)