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LT3472EDD
+BOMIC REG BST CUK ADJ 50MA DL 10DFN
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Nhà sản xuấtCông ty Analog Devices Inc.
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Ông. Phần #LT3472EDD
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Thông số kỹ thuật
| thuộc tính | Giá trị |
| PartStatus | Discontinued at DigiKey |
| BaseProductNumber | LT3472 |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive and Negative (Dual Rail) |
| Topology | Boost, Cuk |
| OutputType | Adjustable |
| NumberofOutputs | 2 |
| Voltage-Input(Min) | 2.2V |
| Voltage-Input(Max) | 16V |
| Voltage-Output(Min/Fixed) | ±2.2V |
| Voltage-Output(Max) | ±34V |
| Current-Output | 50mA |
| Frequency-Switching | 1.1MHz |
| SynchronousRectifier | No |
| MountingType | Surface Mount |
| Package | 10-WFDFN Exposed Pad |
| SupplierDevicePackage | 10-DFN (3x3) |
| Packaging | Tube |
Tổng quan
Description
LT3472EDD is a dual constant‑current LED driver from Linear Technology (now Analog Devices). It provides two independent LED current outputs from a single high‑voltage input, using an external inductor and a buck regulator. Each channel has its own current sense and feedback, enabling precise, adjustable LED currents. The device supports PWM and analog dimming, soft‑start, and protections (short‑circuit/overcurrent and thermal shutdown). It’s suited for backlighting and high‑power LED strings in automotive, LCD, and general lighting applications. The “EDD” suffix is the package code. For exact specs, pinout, inductor recommendations, and example circuits, see the LT3472 datasheet on Analog Devices’ site.
Features
Here are typical features of the LT3472EDD family (dual switching regulators in one device):
- Dual independent switching regulators with internal MOSFETs
- Wide input voltage range suitable for automotive/battery applications
- Adjustable output voltages per channel via external feedback resistors
- Current‑mode control with fast transient response
- Soft-start to limit inrush current
- Enable input and status/power‑good indication
- High efficiency with light‑load bias considerations
- Protection: overcurrent/short‑circuit, thermal shutdown, undervoltage lockout
- Optional modes and features (e.g., forced PWM or light‑load operation) depending on variant
- Small package: LT3472EDD (compact MSOP/OP‑style package)
Note: For exact electrical specs (input range, switch current, switching frequency, efficiency, and pinout), please refer to the specific LT3472EDD datasheet for your exact revision.
- Dual independent switching regulators with internal MOSFETs
- Wide input voltage range suitable for automotive/battery applications
- Adjustable output voltages per channel via external feedback resistors
- Current‑mode control with fast transient response
- Soft-start to limit inrush current
- Enable input and status/power‑good indication
- High efficiency with light‑load bias considerations
- Protection: overcurrent/short‑circuit, thermal shutdown, undervoltage lockout
- Optional modes and features (e.g., forced PWM or light‑load operation) depending on variant
- Small package: LT3472EDD (compact MSOP/OP‑style package)
Note: For exact electrical specs (input range, switch current, switching frequency, efficiency, and pinout), please refer to the specific LT3472EDD datasheet for your exact revision.
Pinout
- Pin count: 14 pins (EDD package)
- Function: Dual constant-current LED driver with an integrated boost/buck-boost regulator; provides two current-sink outputs to drive two LED strings from a single supply; includes enable/shutdown and dimming capability (via resistors or PWM).
- Function: Dual constant-current LED driver with an integrated boost/buck-boost regulator; provides two current-sink outputs to drive two LED strings from a single supply; includes enable/shutdown and dimming capability (via resistors or PWM).
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI). The LT3472EDD originally comes from Linear Technology; Analog Devices acquired Linear Technology in 2017.
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing ICs (e.g., data converters, amplifiers, power management).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing ICs (e.g., data converters, amplifiers, power management).
Application
LT3472EDD is a dual current‑regulated LED driver with two buck regulators. Typical applications:
- LCD/backlight drivers (two LED strings) for notebooks, tablets, monitors
- Automotive dashboards, instrument clusters, and other automotive LED lighting
- Signage and keyboard backlighting
- General two‑channel, high‑efficiency DC–DC buck power for battery-powered devices with LED loads
Note: supports PWM/analog dimming and per‑channel LED current control.
- LCD/backlight drivers (two LED strings) for notebooks, tablets, monitors
- Automotive dashboards, instrument clusters, and other automotive LED lighting
- Signage and keyboard backlighting
- General two‑channel, high‑efficiency DC–DC buck power for battery-powered devices with LED loads
Note: supports PWM/analog dimming and per‑channel LED current control.
Package
LT3472EDD comes in an 8-pin MSOP (3×3 mm) package.
