LM3423MH Part Information
Details for LM3423MH by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
Part Description
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 highvoltage 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 Downloads
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Part Features
- 2-u2126, 1-A Peak MOSFET Gate Driver
- Cycle-by-Cycle Current Limit
- Fault Status Flag and Timer (LM3423/23Q1/23Q0
- High-Side Adjustable Current Sense
- Input Undervoltage and Output Overvoltage Protection
- LED Output Status Flag (LM3423/23Q1/23Q0 Only)
- LM3421Q0/LM3423Q0 are Automotive Grade Products That are AEC-Q100 Grade 0 Qualified
- LM3421Q1/LM3423Q1 are Automotive Grade Products That are AEC-Q100 Grade 1 Qualified
- PWM and Analog Dimming
- Programmable Switching Frequency
- VIN Range From 4.5 V to 75 V
- Zero Current Shutdown and Thermal Shutdown
Part Specifications
| Device Topology | Boost Buck Buck-Boost Flyback SEPIC |
| Input Voltage Min | 4.5V |
| Input Voltage Max | 75V |
| Output Voltage Max | 72V |
| Output Current Max | 5A |
| Switching Frequency | 2MHz |
| No. of Outputs | 1Outputs |
| IC Mounting | SMD |
| Driver Case Style | TSSOP |
| No. of Pins | 20Pins |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Product Range | - |
| Automotive Qualification Standard | AEC-Q100 |
| RoHS Phthalates Compliant | Yes |
| MSL | MSL 1 - Unlimited |
| SVHC | No SVHC (27-Jun-2018) |
| Base Number | 3423 |
| Device Type | LED |
| Dimming Control Type | Analogue PWM |
| Input Voltage | 4.5V to 75V |
| LED Driver Application | Automotive General Illumination |
| Operating Temperature Range | -40°C to +150°C |
| Output Voltage | 75V |
| Supply Voltage Max | 75V |
| Supply Voltage Min | 4.5V |
| Termination Type | Surface Mount Device |