75V 1.0A 恒流 LED 降壓驅動器
| Input voltage (type) | DC/DC |
| Topology | Buck |
| Vin (Min) (V) | 6 |
| Vin (Max) (V) | 75 |
| Iout (Max) (A) | 1 |
| Iq (Typ) (mA) | 0.625 |
| Features | Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown |
| Operating temperature range (C) | -40 to 125 |
| Dimming method | PWM |
- Integrated 1-A MOSFET
- VIN Range 6 V to 42 V (LM3404)
- VIN Range 6 V to 75 V (LM3404HV)
- 1.2-A Output Current Overtemperature
- Cycle-by-Cycle Current Limit
- No Control Loop Compensation Required
- Separate PWM Dimming and Low Power
Shutdown - Supports All-Ceramic Output Capacitors and
Capacitor-lessOutputs - Thermal Shutdown Protection
- SOIC-8 Package, SO PowerPAD?-8 Package
The LM3404 and LM3404HV devices are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, these devices contain a high-side N-channel MOSFET switch with a current limit of 1.5-A (typical) for step-down (Buck) regulators. Hysteretic controlled on-time and an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. Some features are: LED dimming using pulse width modulation (PWM), broken or open LED protection, low-power shutdown, and thermal shutdown.
