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MAX8834YEWP+T Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX8834YEWP+T Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 43 page Adaptive Step-Up Converters with 1.5A Flash Driver _______________________________________________________________________________________ 5 PARAMETER CONDITIONS MIN TYP MAX UNITS TA = +25°C 3.6 4 4.4 Watchdog Timer Accuracy (4s setting) TA = -40°C to +85°C 3.2 4.8 s Open LED Detection Threshold FLED1, FLED2, INDLED enabled 100 mV Shorted LED Detection Threshold FLED1, FLED2, INDLED enabled VOUT - 1V V Open and Short Debounce Timer From LED open or short detected until LED current regulator is disabled 30 ms Thermal-Shutdown Hysteresis 20 °C Thermal Shutdown +160 °C MAXFLASH Low-Battery Detect Threshold Range 33mV steps 2.5 3.4 V Low-Battery Voltage Threshold Accuracy ±2.5 % Low-Battery Voltage Hysteresis Programmable Range 100 200 mV Low-Battery Voltage Hysteresis Step Size 100 mV LB_TMR[1:0] = 00 200 250 300 Low-Battery Reset Time LB_TMR[1:0] = 01 400 500 600 μs ELECTRICAL CHARACTERISTICS (continued) (VIN = 3.6V, VAGND = VPGND = VFGND = 0V, VDD = 1.8V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) Note 1: All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. Note 2: LED current regulator dropout voltage is defined as the voltage when current drops 10% from the current level measured at 0.6V. Note 3: Flash duration is from rising edge of LED_EN until IFLED = 0A (safety time in one-shot mode). Note 4: The adaptive output voltage regulation threshold is individually set on each device to 75mV above the dropout voltage of the LED current regulators. This ensures minimum power dissipation on the IC during a flash event. The dropout voltage chosen is the highest measured dropout voltage of FLED1, FLED2, and INDLED. |
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