XL6001 — 60V 4A Switching Constant-Current LED Driver

Overview

The XL6001 (XL6001E1) is a 60V, 4A step-up (boost) and buck-boost constant-current LED driver IC manufactured by XLSEMI. Packaged in a TO-263-5L (DDPAK) or SOP-8L enclosure, it is widely featured on low-cost high-power LED driver breakout boards sold across global hobbyist markets.

Operating across an input voltage range of 5.0V to 32.0V DC, the XL6001 integrates a 4.0A N-channel power MOSFET rated for 60V output, a 220 kHz fixed-frequency oscillator, and a low 220 mV feedback reference voltage ( $V_{FB}$ ) to minimize sense resistor power dissipation, achieving system efficiency up to $93\%$ .

Quick reference


Input Supply Voltage (`VIN`)	5.0 V to 32.0 V DC
Output Switch Voltage (`SW`)	Up to $60.0\text{ V}$ DC (Internal MOSFET breakdown 60V)
Internal Switch Current	$4.0\text{ A}$ continuous switch limit
Feedback Voltage (`VFB`)	$220\text{ mV}$ low-loss reference
Switching Frequency	$220\text{ kHz}$ fixed frequency
Efficiency	Up to $93\%$ typical
Protection	Thermal shutdown, Over-Current Protection (OCP), Output Over-Voltage Protection
Package	TO-263-5L (DDPAK) / SOP-8L

Pinout (TO-263-5L Package)

Looking at the front face of the 5-lead TO-263 package with leads pointing down:

text

        ┌─────────────┐
        │   O   [TAB] │  (Metal Mounting Tab = SW Output)
        ├─────────────┤
        │   XL6001    │  (Front Package Face)
        └─┬─┬─┬─┬─┬───┘
          1 2 3 4 5

Pin	Name	Type	Description
1	`GND`	Power	Ground Reference (0 V)
2	`EN`	Input	Enable Input (High = Normal Operation; Low = Shutdown)
3	`SW`	Output	Internal N-Channel Power MOSFET Drain (Connected internally to Metal Tab!)
4	`FB`	Input	Constant Current Feedback Input ( $220\text{ mV}$ reference to GND)
5	`VIN`	Power	Positive Supply Input (+5.0V to +32V DC)

Constant LED Current Formula

The constant LED current ( $I_{LED}$ ) is set by resistor $R_{CS}$ connected in series with the LED string to GND:

$I_{LED} = \frac{V_{FB}}{R_{CS}} = \frac{220\text{ mV}}{R_{CS}} = \frac{0.22\text{V}}{R_{CS}}$

$\text{For } I_{LED} = 1.0\text{ A} \implies R_{CS} = \frac{0.22\text{V}}{1.0\text{A}} = 0.22\ \Omega\ \ (2\text{W}).$

Common mistakes

Leaving SW tab uninsulated: The TO-263 metal tab is connected directly to SW (Pin 3). Mounting the tab directly onto a grounded metal heatsink creates a dead short circuit across the internal 60V switch.
Operating without an overvoltage protection Zener: In boost LED drivers, if the LED string is disconnected while powered, $V_{OUT}$ climbs rapidly. Connect a Zener diode ( $V_Z \le 55\text{V}$ ) from $V_{OUT}$ to FB for open-load clamping.

Notes

XL6001 vs PT4115: XL6001 is a 60V 4A boost/buck-boost driver; PT4115 is a 30V 1.2A buck driver for stepping down higher voltages.