LM3421MHX/NOPB
ActiveN-CHANNEL CONTROLLERS FOR CONSTANT CURRENT LED DRIVERS WITH SERIES DIM FET DRIVER
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LM3421MHX/NOPB
ActiveN-CHANNEL CONTROLLERS FOR CONSTANT CURRENT LED DRIVERS WITH SERIES DIM FET DRIVER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3421MHX/NOPB |
|---|---|
| Dimming | Analog, PWM |
| Frequency | 2 MHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 16-PowerTSSOP |
| Package / Case | 0.173 in, 4.4 mm Width |
| Supplier Device Package | 16-HTSSOP |
| Topology | SEPIC, Step-Down (Buck), Step-Up (Boost) |
| Type | DC DC Controller |
| Voltage - Output [Max] | 72 V |
| Voltage - Output [Min] | 3 V |
| Voltage - Supply (Max) [Max] | 75 V |
| Voltage - Supply (Min) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 3.13 | |
| 10 | $ 2.81 | |||
| 25 | $ 2.66 | |||
| 100 | $ 2.30 | |||
| 250 | $ 2.19 | |||
| 500 | $ 1.96 | |||
| 1000 | $ 1.65 | |||
| Digi-Reel® | 1 | $ 3.13 | ||
| 10 | $ 2.81 | |||
| 25 | $ 2.66 | |||
| 100 | $ 2.30 | |||
| 250 | $ 2.19 | |||
| 500 | $ 1.96 | |||
| 1000 | $ 1.65 | |||
| Tape & Reel (TR) | 2500 | $ 1.57 | ||
| 5000 | $ 1.51 | |||
| Texas Instruments | LARGE T&R | 1 | $ 2.36 | |
| 100 | $ 2.07 | |||
| 250 | $ 1.45 | |||
| 1000 | $ 1.17 | |||
Description
General part information
LM3421-Q1 Series
The LM3421-Q1 and LM3423-Q1 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 these controllers 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-Q1 and LM3423-Q1 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-Q1 and LM3423-Q1 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.
Documents
Technical documentation and resources
