The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power N-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
|Part number||Order||Input voltage (type)||Vin (Min) (V)||Vin (Max) (V)||Iout (Max) (A)||Vout (Min) (V)||Vout (Max) (V)||Regulated outputs (#)||Topology||Dimming method||Power factor correction (Min)||Type||Switching frequency (Min) (kHz)||Switching frequency (Max) (kHz)||Iq (Typ) (mA)||Vref (V)||UVLO thresholds on/off (V)||Features||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
|300||1000||0.78||0.2||3.6 / 3.4||
Adjustable Switch Frequency
|-40 to 125||HVSSOP | 8||8HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 8)|