SNVS682D November 2010 – December 2015 LM3444
PRODUCTION DATA.
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | VSSOP | SOIC | ||
COFF | 4 | 8 | I | OFF time setting pin. A user set current and capacitor connected from the output to this pin sets the constant OFF time of the switching controller. |
FILTER | 5 | 2 | I | Filter input. A low pass filter tied to this pin can filter a PWM dimming signal to supply a DC voltage to control the LED current. Can also be used as an analog dimming input. If not used for dimming connect a 0.1-µF capacitor from this pin to ground. |
GATE | 8 | 5 | O | Power MOSFET driver pin. This output provides the gate drive for the power switching MOSFET of the buck controller. |
GND | 6 | 3 | — | Circuit ground connection |
ISNS | 7 | 4 | I | LED current sense pin. Connect a resistor from main switching MOSFET source, ISNS to GND to set the maximum LED current. |
NC | 1, 2, 3, 10 | 1, 7 | — | No internal connection. Leave this pin open. |
VCC | 9 | 6 | O | Input voltage pin. This pin provides the power for the internal control circuitry and gate driver. |