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The L99LD20 is a flexible LED driver, which is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a high efficiency monolithic dual buck converter.
The buck converters integrate n-channel MOSFET which is driven by a bootstrap circuit.
When more than two LED channels are required on one module, then more devices L99LD20 can be combined; also with L99LD21 device - incorporating Boost Controller - from which L99LD20 derivate.Key Features
- AEC-Q100 qualified
- General
- ST SPI communication v4.1
- 5.5 to 24 V Operating battery voltage range
- Load dump protected
- QFN40L 6x6 (wettable flanks) with exposed pad
- Timeout watchdog and limp home function
- Low standby current
- Buck section
- Integrated switching mosfets
- Lossless current sensing without need of external components
- Very accurate LED current setting programming inductor's peak current and peak-to-peak current ripple
- Adjustable peak current by SPI
- Adjustable current ripple by SPI
- Integrated PWM generation unit with 10-bit resolution and phase shift
- Peak current control
- Constant VLED x TOFF architecture
- Protection and diagnostic
- Battery under voltage
- Temperature warning (2 thresholds)
- Overtemperature shutdown
- LED voltage digital feedback through SPI
- Buck outputs short circuit and open load protection
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L99LD20Q6 | Active | VFQFPN 6X6 | Automotive | Ecopack2 | |
| L99LD20Q6TR | Active | VFQFPN 6X6 | Automotive | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | Package | Packing Type | Temperature (°C) | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||
| L99LD20Q6TR | 3 distributors | Buy now | Active | VFQFPN 6X6 | Tape And Reel | - | - | EAR99 | THAILAND | 1.753 / 1k | |
| L99LD20Q6 | No availability of distributors reported, please contact our sales office | Active | VFQFPN 6X6 | Tray | - | - | EAR99 | THAILAND | 1.753 / 1k | ||
L99LD20Q6
Marketing Status
ActiveUnit Price (US$)
1.753Budgetary Price (US$)*/Qty
1.753 / 1k(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
