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CAT3606HV4-T2 Datasheet(PDF) 9 Page - ON Semiconductor |
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CAT3606HV4-T2 Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 11 page CAT3606 http://onsemi.com 9 TYPICAL CHARACTERISTICS (VIN = 3.6 V, EN = VIN, ENM = ENS = GND, CIN = COUT = 1 mF, TAMB = 25°C, unless otherwise specified.) Figure 21. Foldback Current Limiting OUTPUT CURRENT (mA) 500 400 300 200 100 0 0 1 2 3 4 5 1x Mode Figure 22. RSET Pin Voltage vs. Temperature −50 −25 0 25 50 75 100 125 1.16 1.18 1.20 1.22 1.24 Figure 23. PWM Dimming at 1 kHz on ENM and ENS 50mA/div Current Tot. LED 1V/div VOUT ENM & ENS 5V/div 200 msec/div TEMPERATURE (°C) Recommended Layout When the driver is in the 1.5x charge pump mode, the 1 MHz switching frequency operation requires to minimize trace length and impedance to ground on all 4 capacitors. A ground plane should cover the area on the bottom side of the PCB opposite to the IC and the bypass capacitors. Capacitors Cin and Cout require short connection to ground which can be done with multiple vias as shown on Figure 24. A square copper area matches the QFN16 exposed pad (GND) and must be connected to the ground plane underneath. The use of multiple via will improve the heat dissipation. Figure 24. PCB Layout |
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