component
TD8655
Public Made by Adomby adom
Techcode Semicon DC-DC Converters, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
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"description": "Internal high-side driver power bias, typically 5.4V above VIN, with a typical 0.1uF capacitor connected between BST and SW."
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{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Supply input, recommended 9V to 40V with absolute maximum rating of -0.3 to +43V."
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{
"number": "3",
"name": "ISENSE",
"type": "input",
"description": "Input current sense; absolute maximum rating ISENSE to VIN is -0.3 to +0.3 V."
},
{
"number": "4",
"name": "COMP",
"type": "passive",
"description": "Error amplifier output where the converter stability compensation network is placed; absolute maximum rating to GND is -0.3 to +6 V."
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{
"number": "5",
"name": "FREQ",
"type": "input",
"description": "Switching frequency setting: a 120k to 30k ohm resistor to GND sets FSW=12000k/RF, and a floating pin gives 200kHz."
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{
"number": "6",
"name": "FB",
"type": "input",
"description": "Feedback input referenced to 1.20V (VFB), set by a resistor divider between VOUT and GND; absolute maximum rating -0.3 to +6 V."
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{
"number": "7",
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"description": "On/off control pin; electrical characteristics are specified with EN=3V."
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{
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"description": "Sets the output constant-current level, with VISET = 1.2V x (R18/(R18+R19)); absolute maximum rating -0.3 to +6 V."
},
{
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"type": "input",
"description": "Current limit of the 1st output; threshold voltage is 108mV across the sense resistor RCS1 (IOC = 108mV/RCS)."
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{
"number": "10",
"name": "COUT2",
"type": "input",
"description": "Current limit of the 2nd output; threshold voltage is 108mV across the sense resistor RCS2 (IOC = 108mV/RCS)."
},
{
"number": "11",
"name": "COUT3",
"type": "input",
"description": "Current limit of the 3rd output; threshold voltage is 108mV across the sense resistor RCS3 (IOC = 108mV/RCS)."
},
{
"number": "12",
"name": "COUT4",
"type": "input",
"description": "Current limit of the 4th output; threshold voltage is 108mV across the sense resistor RCS4 (IOC = 108mV/RCS); absolute maximum rating to GND is -0.3 to +0.3 V."
},
{
"number": "13",
"name": "CS34",
"type": "input",
"description": "Pull low to disable the COUT3/COUT4 constant-current function, and high to enable it."
},
{
"number": "14",
"name": "SS",
"type": "passive",
"description": "Soft-start pin; a capacitor is connected between this pin and GND (typical soft-start time 10 ms with CSS = 0.1uF)."
},
{
"number": "15",
"name": "TS",
"type": "passive",
"description": "Test pin; the datasheet gives no functional description or connection requirement."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Ground pin."
},
{
"number": "17",
"name": "LSD",
"type": "output",
"description": "Low-side driver output for the external low-side power NMOS in the synchronous configuration."
},
{
"number": "18",
"name": "VDD",
"type": "power_out",
"description": "Internal 5.4V power supply; a 1uF (or more) capacitor is connected between this pin and GND."
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{
"number": "19",
"name": "SW",
"type": "passive",
"description": "Inductor terminal (switch node); absolute maximum rating SW to GND is -0.3 to VIN+0.6 V."
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{
"number": "20",
"name": "HSD",
"type": "output",
"description": "High-side driver output for the external high-side power NMOS in the synchronous configuration."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
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"min": -0.3,
"typ": null,
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"conditions": "",
"source_page": 3,
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{
"name": "COUT1-4 to GND",
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"source_page": 4,
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"min": -60,
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"source_page": 4,
"source": "datasheet"
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{
"name": "Maximum Lead Soldering Temperature",
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"conditions": "10 Seconds",
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