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MAX16814BEUP+ Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX16814BEUP+ Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 25 page Pin Description PIN NAME FUNCTION TQFN/ QFND TSSOP 1 4 IN Bias Supply Input. Connect a 4.75V to 40V supply to IN. Bypass IN to SGND with a ceramic capacitor. 2 5 EN Enable Input. Connect EN to logic-low to shut down the device. Connect EN to logic-high or IN for normal operation. The EN logic threshold is internally set to 1.23V. 3 6 COMP Switching Converter Compensation Input. Connect the compensation network from COMP to SGND for current-mode control (see the Feedback Compensation section). 4 7 RT Oscillator Timing Resistor Connection. Connect a timing resistor (RT) from RT to SGND to program the switching frequency according to the formula RT = 7.350 x 109/fsw (for the MAX16814A_ _ and the MAX16814U_ _) or to the formula RT = 7.72 x 109/fsw (for the MAX16814B_ _ _). Apply an AC-coupled external clock at RT to synchronize the switching frequency with an external clock. 5 8 FLT Open-Drain Fault Output. FLT asserts low when an open LED, short LED, or thermal shutdown is detected. Connect a 10kω pullup resistor from FLT to VCC. 6 9 OVP Overvoltage-Threshold-Adjust Input. Connect a resistor-divider from the switching converter output to OVP and SGND. The OVP comparator reference is internally set to 1.23V. 7 10 SETI LED Current-Adjust Input. Connect a resistor (RSETI) from SETI to SGND to set the current through each LED string (ILED) according to the formula ILED = 1500/RSETI. 8 11 RSDT LED Short Detection Threshold Adjust Input. Connect a resistive divider from VCC to RSDT and SGND to program the LED short detection threshold. Connect RSDT directly to VCC to disable LED short detection. The LED short detection comparator is internally referenced to 2V. 9 12 SGND Signal Ground. SGND is the current return path connection for the low-noise analog signals. Connect SGND, LEDGND, and PGND at a single point. 10 13 DIM Digital PWM Dimming Input. Apply a PWM signal to DIM for LED dimming control. Connect DIM to VCC if dimming control is not used. 11 14 OUT1 LED String Cathode Connection 1. OUT1 is the open-drain output of the linear current sink that controls the current through the LED string connected to OUT1. OUT1 sinks up to 150mA. If unused, connect OUT1 to LEDGND. www.maximintegrated.com Maxim Integrated │ 8 MAX16814 Integrated, 4-Channel, High-Brightness LED Driver with High-Voltage DC-DC Controller |
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