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AS3648 Datasheet(PDF) 5 Page - ams AG |
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AS3648 Datasheet(HTML) 5 Page - ams AG |
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5 / 39 page  www.austriamicrosystems.com/AS3648 1.5-4 4 - 38 AS3648 Datasheet, Confidential - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VVIN = +2.7V to +4.4V, TAMB = -30ºC to +85ºC, unless otherwise specified. Typical values are at VVIN = +3.7V, TAMB = +25ºC, unless otherwise specified. Table 4. Electrical Characteristics Symbol Parameter Condition Min Typ Max Unit General Operating Conditions VVIN Supply Voltage pin VIN 2.7 3.7 4.4 V VVINREDUCE D_FUNC Supply Voltage AS3648 functionally working, but not all parameters fulfilled 2.5 2.7 V 4.4 5.5 ISHUTDOWN Shutdown Current TXMASK/TORCH=L, SCL=SDA=0V, VVIN<3.7V 0.6 2.0 µA ISTANBY Standby Current interface active, TXMASK/TORCH=L, VVIN<3.7V 1 1.0 10 µA TAMB Operating Temperature -30 25 85 ºC Eta Application Efficiency (DCDC and current sink) LCOIL=0.6µH@3A, LESR=60m , LED_OUT1,2=1300mA 2, tFLASH<300ms 84 % DCDC Step Up Converter VVOUT DCDC Boost output Voltage (pin VOUT1/2) 2.8 5.5 V VVOUT5V DCDC Boost output Voltage (pin VOUT1/2) constant voltage mode operation const_v_mode (see page 25)=1 5.0 V RPMOS On-resistance DCDC internal PMOS switch 70 m RNMOS On-resistance DCDC internal NMOS switch 70 m fCLK Operating Frequency All internal timings are derived from this oscillator -7.5% 4.0 +7.5% MHz Current Sinks VLED LED forward voltage two flash LEDs at 1800mA combined 2.8 3.5 3.95 V single flash LED at 1600mA 2.8 4.2 V ILED_OUT LED_OUT1/2 current sinks output combined dual flash LED current_boost=1 0 2000 3 mA current_boost=0 0 1800 single flash LED 1600 mA ILED_OUT LED_OUT1/2 current sink accuracy ILED_OUT>=800mA or ILED_OUT<500mA 0ºC < TJ < 100ºC -7 +7 % 500mA<ILED_OUT<800mA, 0ºC < TJ < 100ºC -5 +5 % ILED_OUT RAMP LED_OUT1/2 ramp time Ramp-up During startup 250 1000 µs Ramp-down 500 1000 µs ILED_OUT RIPPLE LED_OUT current ripple ILED_OUT = 1000mA, BW=20MHz 20 mAPP VILED_COMP LED_OUT current sink voltage compliance Minimum voltage between pin LED_OUT1/2 and GND for operation of the current sink current_boost=0 325 mV current_boost=1 360 |
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