LM3421是TI公司的一款LED照明-照明产品,LM3421是用于恒流 LED 驱动器的 N 通道控制器,本页介绍了LM3421的产品说明、应用、特性等,并给出了与LM3421相关的TI元器件型号供参考。
LM3421 - 用于恒流 LED 驱动器的 N 通道控制器 - LED照明-照明 - LED驱动器 - TI公司(Texas Instruments,德州仪器)
- LM3421Q1/LM3423Q1 are Automotive Grade Products That are AEC-Q100 Grade 1 Qualified
- LM3421Q0/LM3423Q0 are Automotive Grade Products That are AEC-Q100 Grade 0 Qualified
- VIN Range From 4.5 V to 75 V
- High-Side Adjustable Current Sense
- 2-Ω, 1-A Peak MOSFET Gate Driver
- Input Undervoltage and Output Overvoltage Protection
- PWM and Analog Dimming
- Cycle-by-Cycle Current Limit
- Programmable Switching Frequency
- Zero Current Shutdown and Thermal Shutdown
- LED Output Status Flag (LM3423/23Q1/23Q0 Only)
- Fault Status Flag and Timer (LM3423/23Q1/23Q0 Only)
- LED Drivers: Buck, Boost, Buck-Boost, and SEPIC
- Indoor and Outdoor Area SSL
- Automotive
- General Illumination
- Constant-Current Regulators
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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM3421 | HTSSOP (16) | 5.00 mm × 4.40 mm |
LM3421-Q1 | ||
LM3423 | HTSSOP (20) | 6.50 mm × 4.40 mm |
LM3423-Q1 |