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ADP8861 数据表(PDF) 3 Page - Analog Devices |
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ADP8861 数据表(HTML) 3 Page - Analog Devices |
3 / 40 page ADP8861 Rev. 0 | Page 3 of 40 SPECIFICATIONS VIN = 3.6 V, SCL = 2.7 V, SDA = 2.7 V, nINT = open, nRST = 2.7 V, VD1:D7 = 0.4 V, Capacitor C1 = 1 μF, Capacitor C2 = 1 μF, COUT = 1 μF, typical values are at TA = 25°C and are not guaranteed, minimum and maximum limits are guaranteed from TA = −40°C to +85°C, unless otherwise noted. Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit SUPPLY Input Voltage Operating Range VIN 2.5 5.5 V Start-Up Level VIN(START) VIN increasing 2.05 2.30 V Low Level VIN(STOP) VIN decreasing 1.75 1.97 V VIN(START) Hysteresis VIN(HYS) After startup 80 mV UVLO Noise Filter tUVLO 10 μs Quiescent Current IQ Prior to VIN(START) IQ(START) VIN = VIN(START) − 100 mV 10 μA During Standby IQ(STBY) VIN = 3.6 V, Bit nSTBY = 0, SCL = SDA = 0 V 0.3 1.0 μA After Startup and Switching IQ(ACTIVE) VIN = 3.6 V, Bit nSTBY = 1, IOUT = 0 mA, gain = 2× 4.5 7.2 mA OSCILLATOR Charge pump gain = 2× Switching Frequency fSW 0.8 1 1.32 MHz Duty Cycle D 50 % OUTPUT CURRENT CONTROL Maximum Drive Current ID1:D7(MAX) VD1:D7 = 0.4 V Diode1 to Diode 7 Bit SCR = 0 in the ISC7 register TJ = 25°C 26.2 30 34.1 mA TJ = −40°C to +85°C 24.4 34.1 mA Diode 7 Only (60 mA Setting) ID7(60 mA) VD7 = 0.4 V, Bit SCR = 1 in the ISC7 register TJ = 25°C 52.5 60 67 mA TJ = −40°C to +85°C 48.8 67 mA LED Current Source Matching1 IMATCH All Current Sinks IMATCH7 VD1:D7 = 0.4 V 2.0 % Diode 2 to Diode 7 Current Sinks IMATCH6 VD2:D7 = 0.4 V 1.5 % Leakage Current on LED Pins ID1:D7(LKG) VIN = 5.5 V, VD1:D7 = 2.5 V, Bit nSTBY = 1 0.5 μA Equivalent Output Resistance ROUT Gain = 1× VIN = 3.6 V, IOUT = 100 mA 0.5 Ω Gain = 1.5× VIN = 3.1 V, IOUT = 100 mA 3.0 Ω Gain = 2× VIN = 2.5 V, IOUT = 100 mA 3.8 Ω Regulated Output Voltage VOUT(REG) VIN = 3 V, gain = 2×, IOUT = 10 mA 4.3 4.9 5.5 V AUTOMATIC GAIN SELECTION Minimum Voltage Gain Increases VHR(UP) Decrease VD1:D7 until the gain switches up 162 200 276 mV Minimum Current Sink Headroom Voltage VHR(MIN) IDX = IDX(MAX) × 95% 180 mV Gain Delay tGAIN The delay after gain has changed and before gain is allowed to change again 100 μs FAULT PROTECTION Start-Up Charging Current Source ISS VIN = 3.6 V, VOUT = 0.8 × VIN 2.5 3.75 5.5 mA Output Voltage Threshold VOUT Exit Soft Start VOUT(START) VOUT rising 0.92 × VIN V Short-Circuit Protection VOUT(SC) VOUT falling 0.55 × VIN V |
类似零件编号 - ADP8861 |
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类似说明 - ADP8861 |
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