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A8513 Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A8513 Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 24 page Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver A8513 5 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ELECTRICAL CHARACTERISTICS1 Valid at VIN = 16 V, TA = 25ºC, indicates specifications guaranteed through the full operating temperature range with TA = TJ = –40ºC to125 ºC, typical specifications are at TA = 25ºC; unless otherwise specified Characteristics Symbol Test Conditions Min. Typ. Max. Unit Input Voltage Specifications Operating Input Voltage Range VIN 4.5 − 40 V VIN Pin UVLO Start Threshold VUVLOrise VIN rising −− 4.35 V VIN Pin UVLO Stop Threshold VUVLOfall VIN falling −− 3.90 V VIN Pin UVLO Hysteresis VUVLOhys − 450 − mV Input Current Input Quiescent Current IQ EN/PWM = VIH, SW = 2 MHz, no load − 5 − mA Input Sleep Supply Current IQSLEEP VIN = 16 V, EN/PWM = 0 V − 110 μA Input Logic Levels (EN/PWM and ¯ F ¯¯ A¯ ¯ ¯ U¯¯ L ¯¯ T ¯ 3) Input logic Level (Low) VIL 5 V < VIN < 40 V −− 400 mV Input logic Level (High) VIH 5 V < VIN < 40 V 1.5 −− V EN/PWM Pull-Down Resistor REN/PWM EN/PWM = 5 V − 100 − kΩ ¯F¯¯A¯¯¯U¯¯L¯¯T¯ Pin Pull-Down Voltage VFAULT IFAULT = 0.5 mA −− 0.4 V ¯F¯¯A¯¯¯U¯¯L¯¯T¯ Pin Leakage Current IFAULTlkg VFAULT = 5 V −− 1 μA Error Amplifier Open Loop Voltage Gain AVOL − 45 − dB Transconductance gm ΔICOMP = ±10 μA − 990 −μA/V Source Current IEA(SRC) VCOMP = 1.5 V − –360 −μA Sink Current IEA(SINK) VCOMP = 1.5 V − 360 −μA COMP Pin Pull-Down Resistance RCOMP ¯F¯¯A¯¯¯U¯¯L¯¯T¯ asserted − 2000 −Ω Output Overvoltage Protection Overvoltage Protection Threshold VOVPHI(th) Measured at OVP Pin 1.168 1.218 1.268 V OVP Pin Leakage Current IOVPH Standard CMOS input, measured at VOVP = 1.2 V −− 100 nA OVP Pin Undervoltage Threshold VUVP(th) Measured at OVP Pin −− 110 mV Secondary Overvoltage Protection VOVP(sec) Measured at SW Pin 53 55.5 58 V BOOST Switch Switch On-Resistance RDS(on)SW ISW = 750 mA, VIN = 16 V − 450 800 mΩ Switch Leakage Current ISWlkg VSW = 16 V, EN/PWM = VIL, TA = TJ between –40ºC and 85ºC − 0.1 1 uA VSW = 16 V, EN/PWM = VIL, TA = TJ=125ºC − 10 − uA Switch Current Limit ISW(LIM) 1.9 2.2 2.8 A Secondary Switch Current Limit ISW(LIM2) Higher than ISW(LIM)(max) in all conditions, A8513 latches when detected 3 3.5 4.64 A Minimum Switch On-Time tSW(ON) − 75 100 ns Minimum Switch Off-Time tSW(OFF) − 55 85 ns Continued on the next page… |
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