AT9919K7-G
ActiveHYSTERETIC, BUCK, HIGH BRIGHTNESS LED DRIVER W/ HIGH-SIDE CURRENT SENSING
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AT9919K7-G
ActiveHYSTERETIC, BUCK, HIGH BRIGHTNESS LED DRIVER W/ HIGH-SIDE CURRENT SENSING
Technical Specifications
Parameters and characteristics for this part
| Specification | AT9919K7-G |
|---|---|
| Dimming | Analog, PWM |
| Frequency | 2 MHz |
| Grade | Automotive |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-WDFN Exposed Pad |
| Qualification | AEC-Q100 |
| Supplier Device Package | 8-DFN (3x3) |
| Topology | Step-Down (Buck) |
| Type | DC DC Controller |
| Voltage - Supply (Max) [Max] | 40 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 | $ 1.36 | |
| 25 | $ 1.13 | |||
| 100 | $ 1.03 | |||
| Digi-Reel® | 1 | $ 1.36 | ||
| 25 | $ 1.13 | |||
| 100 | $ 1.03 | |||
| Tape & Reel (TR) | 3300 | $ 1.03 | ||
| Microchip Direct | T/R | 1 | $ 1.36 | |
| 25 | $ 1.13 | |||
| 100 | $ 1.03 | |||
| 1000 | $ 1.00 | |||
| 5000 | $ 0.99 | |||
| Newark | Each (Supplied on Cut Tape) | 1 | $ 1.94 | |
| 10 | $ 1.93 | |||
| 25 | $ 1.73 | |||
| 50 | $ 1.68 | |||
Description
General part information
AT9919 Series
The AT9919 is a PWM controller IC designed to drive high brightness LEDs using a buck topology. It operates from an input voltage of 4.5 to 40VDC and employs hysteretic control
with a high-side current sense resistor to set the constant output current.
The operating frequency range can be set by selecting the proper inductor. Operation at high switching frequency is possible since the hysteretic control maintains accuracy even at high frequencies. This permits the use of small inductors and capacitors minimizing space and cost in the overall system.
Documents
Technical documentation and resources