iC-JJ POWER MANAGEMENT iC
●GENERAL DESCRIPTION
■Monolithic device iC-JJ supplies electronic systems from a single input voltage VBAT(6V to 16.5V)with voltages which range from 5V to 48V.The autarky function guarantees that the output voltages are maintained for up to several hundred milliseconds,even after the input voltage has been aborted.
■A step-up converter produces a voltage of VBAT+2V to 48V,whose setpoint is adjusted via two external resistors at VA1x.Two 5V linear regulators provide 200mA(VCC)and 60mA(VREF).Alternatively,260mA are available from the 6V step-down converter(VH)whose switching frequency is generated by an integrated 120kHz oscillator.An additional tristate-competent output provides 12V to 30mA and can be activated via a control input for writing data to EEPROMs,for example.
■The integrated low voltage and autarky detection function indicates at the error message outputs VTU and NVTA when the relevant low voltage thresholds are reached;there are two different error message outputs for this purpose.The error message is deleted by an external low signal and not when the supply voltage rises again.Information on temporary voltage drops is retained.If the autarky voltage threshold is undershot,the iC automatically switches into autarky mode.This mode can also be simulated in order to test the autarky capacitor CVA.
■Integrated high-and low-side drivers permit various loads to be connected,such as panel indicators(visual monitors),for example.The drivers are switched via control inputs and status outputs are signaling the current switching state back to the controller.
■iC-JJ monitors the chip temperature;with excessive temperature the high-and low-side drivers are switched off to reduce the power dissipation.
■The integrated watchdog can monitor the correct operation of an external processor.If used,the bi-directional serial communication interface connects the chip with external diagnosis components.The iC can be switched to standby via the input ENA and then draws a low standby current of typically 30μA.
■The device is protected against destruction due to ESD.
●FEATURES
■Supply voltage range of VBAT= 6 to 16.5V
■Autarky function to maintain temporarily output voltages with breakdown of supply voltage
■Adjustable 200mA boost converter (VA1= VBAT+2V to 48V)
■6V step-down regulator with integrated 125kHz oscillator
■Two downstream 5V linear regulators with 200mA/60mA output current
■12V/30mA tri-state output
■Low standby current of typ. 30μA
■Integrated high/low-side drivers e.g. to attach indicator lamps
■Overtemperature shutdown of high- and low-side drivers
■Undervoltage detection
■Serial single-wire communication interface
■Watchdog for monitoring of the external μ-controller
■CMOS-compatible inputs
■TTL-/CMOS-compatible outputs
■ESD protection
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2017/11/18 |
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Rev A1 |
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699 KB |
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