| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Frequency | 2 MHz |
| Number of Pins | 20 Pin |
| Case/Package | TSSOP-20 |
| Number of Outputs | 1 Output |
| Input Voltage (DC) | 4.50V ~ 75.0V |
| Output Voltage | 75 V |
| Output Current | 1 A |
| Number of Positions | 20 Position |
| Quiescent Current | 2.00 mA |
| Number of Regulated Outputs | 1 Output |
| Switching Frequency | 2 MHz |
| Thermal Shutdown | Yes |
| Input Voltage (Max) | 75 V |
| Input Voltage (Min) | 4.5 V |
| Operating Temperature (Max) | 125 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Supply Voltage | 4.5V ~ 75V |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Active |
| Packaging | Each |
| Size-Width | 4.4 mm |
| Operating Temperature | -40℃ ~ 150℃ (TJ) |
The LM3421 and LM3423 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75 V, makes the LM3421 and LM3423 devices ideal for illuminating LEDs in a large family of applications.
●Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421 and LM3423 devices use predictive off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.
●The LM3421 and LM3423 devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions.
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