TPS61165DBVR - 1.2A White LED Boost Driver, SOT-23-6 | TI
部品番号: TPS61165DBVR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.42 | $14.20 |
| 100 | $1.05 | $105.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.68 | $680.00 |
TPS61165DBVR 概要
A boost converter (also called a step-up converter) is a switch-mode DC-DC converter that produces an output voltage higher than its input. Boost converters belong to the switching regulator family (alongside buck, buck-boost, SEPIC, and flyback topologies), which in turn falls under the broader category of voltage regulators within power management ICs. For LED driving, the boost topology is preferred when the LED string forward voltage exceeds the input supply - a common situation when powering white LEDs from a single-cell Li-ion battery or a 3.3-V/5-V rail.
Key features include a built-in 38-V open-LED protection circuit, flexible 1-wire EasyScale digital brightness control, and PWM dimming capability. The 1.2-MHz switching frequency enables the use of small external inductors and ceramic capacitors, while the internal switch removes the need for an external FET. The SOT-23-6 package measures approximately 2.9 mm x 1.6 mm, making the IC suitable for space-limited handheld designs.
The TPS61165DBVR uses peak-current-mode control with internal compensation, simplifying the external component selection to one inductor, input/output capacitors, a feedback resistor, and a sense resistor. This architecture balances regulation accuracy against BOM size, and the high switching frequency minimizes output ripple on the LED current. Load-disconnect during shutdown prevents leakage current through the LED string when the IC is disabled.
Typical applications include single-cell Li-ion powered LED flash, smartphone backlight drivers, portable medical illumination, and industrial indicator panels. The wide VIN range also supports 9-V, 12-V, and 15-V bus systems, where the boost converter delivers tens of volts across multi-LED strings. For flash applications, the high switch current limit supports short-duration high-current pulses.
When designing with this part, derate the inductor saturation current to at least 1.5 A to handle peak inductor currents during PWM dimming transients. Place the input capacitor and feedback resistors close to the IC pins to minimize switching noise injection into the analog control loop. The open-LED protection engages at approximately 38 V across the SW node - ensure the output capacitor and rectifier ratings exceed this threshold.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB design notes not consolidated in the TI datasheet, helping engineers shorten part selection and reduce time-to-prototype.
ドロップイン代替品: TPS61165DBVR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TPS61165DBVT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS61165TDBVRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS61165DRVT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS61040DBVR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS61041DBVRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17061ETI+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS61165DBVR 最大定格＆電気的特性
| トポロジー | Boost (Step-Up) |
| 出力数 | 1 |
| 入力電圧範囲 | 3 V to 18 V |
| 出力電圧 - 最大 | 38 V (Open-LED protection) |
| Switch Current Limit | 1.2 A |
| スイッチング周波数 | 1.2 MHz (typ) |
| 基準電圧 | 200 mV (typ) |
| Reference Voltage Tolerance | 2% |
| Dimming Control | 1-Wire EasyScale + PWM |
| Internal Switch FET | 40 V rated |
| Open-LED Protection | 38 V |
| Load Disconnect During Shutdown | Yes |
| 動作温度範囲 | -40 C to +85 C |
| パッケージ | SOT-23-6 (DBV) |
| 実装タイプ | Surface Mount |
| MSLレベル | 1 (unlimited) |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
TPS61165DBVR ピン構成
| ピン 1 | VIN — Input supply voltage, 3 V to 18 V |
| ピン 2 | SW — Switch node, connects to inductor |
| ピン 3 | GND — Ground return |
| ピン 4 | FB — Feedback voltage input (200 mV ref) |
| ピン 5 | CTRL — Brightness control (PWM/EasyScale) |
| ピン 6 | EN/SHUTDOWN — Enable input (active high) |
主な用途
TPS61165DBVR の用途: 6 件s: Smartphone LED Flash Driver, LCD Backlight Driver, Portable Medical Illumination, Industrial Status Indicators, Handheld Barcode Scanner LED, Automotive Interior LED Lighting.
Smartphone LED Flash Driver
The TPS61165DBVR's 3-V to 18-V input range covers the full Li-ion battery discharge curve from 3.0 V empty to 4.2 V fully charged, while its 1.2-MHz switching frequency enables a compact 10-uH inductor that fits inside the tight volume of a phone PCB. The 1.2-A switch limit supports peak flash currents of 500-800 mA pulsed through a dual-LED string, with the 38-V open-LED protection clamping the SW node if the LED string is disconnected during camera operation. EasyScale 1-wire dimming allows the camera module to set flash brightness via a single GPIO, eliminating the need for a separate PWM channel. Place the TPS61165DBVR close to the battery connector with input ceramic capacitors within 5 mm of VIN, and route the SW trace as short as possible to minimize radiated EMI that could couple into the camera image sensor.
おすすめ
LCD Backlight Driver
Small-to-medium LCD displays with 4 to 8 series-connected white LEDs typically require 12 V to 24 V total forward voltage, which the TPS61165DBVR generates from a 3.3-V or 5-V system rail using its boost topology. The 200-mV reference with 2% tolerance drives a feedback resistor network that sets the LED string current precisely, eliminating visible brightness mismatch across the LCD panel. PWM dimming at 200 Hz to 1 kHz allows software-controlled backlight brightness, while EasyScale supports a one-wire interface for boards with limited GPIO availability. The SOT-23-6 footprint plus small external L-C components enable the entire driver to occupy less than 25 mm² of PCB area, ideal for handheld instruments and tablets. Provide adequate copper pour under the exposed thermal pad region to dissipate the boost converter losses at maximum LED current.
おすすめ
Portable Medical Illumination
Battery-powered medical devices such as pulse oximeters, handheld otoscopes, and dental curing lights need reliable white-LED illumination from 1S Li-ion or 2x AA alkaline batteries. The TPS61165DBVR's 3-V to 18-V VIN range accommodates both battery chemistries directly, while its 1.2-A switch limit supports continuous 200-500 mA LED drive levels needed for diagnostic-grade illumination. The integrated 40-V FET with 38-V open-LED protection prevents SW-node overshoot that could damage the IC if the LED string is unplugged mid-procedure - a critical safety feature for medical equipment. Load-disconnect during shutdown prevents battery drain through the LED string when the device is off, extending shelf life. Add reverse-battery protection on VIN for handheld medical devices subject to battery insertion errors, and verify IEC 60601 EMI compliance given the 1.2-MHz switching frequency.
おすすめ
Industrial Status Indicators
Industrial control panels, machine vision systems, and process automation equipment use bright LEDs for status indication and warning beacons. The TPS61165DBVR's wide 3-V to 18-V VIN range supports 5-V, 12-V, and 15-V industrial bus rails directly, eliminating the need for a pre-regulator. The 1.2-A boost switch supports long LED strings or high-power indicator LEDs that exceed the input voltage, while PWM dimming enables software-controlled beacon patterns without external FET drivers. Operating temperature range of -40 C to +85 C covers the majority of industrial enclosure environments, though for extreme-temperature applications verify the plastic SOT-23-6 package thermal performance. Add a TVS diode on VIN for surge protection in factory-floor installations where inductive loads create transient voltage spikes above 18 V.
おすすめ
Handheld Barcode Scanner LED
Barcode scanners and handheld data terminals use high-brightness LEDs to illuminate 1D and 2D barcodes at varying ambient light levels. The TPS61165DBVR delivers pulsed LED currents up to its 1.2-A switch limit for the brief scan illumination periods, then drops to a low standby state between scans to conserve battery life. The 1-wire EasyScale interface allows the scanner microcontroller to adjust LED brightness on the fly based on ambient light sensor readings, optimizing readability versus battery drain. Wide VIN range covers 2x AA, 2x Li-ion, and USB-powered scanner designs without a separate boost converter. Select an inductor with low DCR (less than 100 milliohms) to maximize efficiency during high-current scan pulses, where every milliwatt of switching loss reduces battery runtime.
おすすめ
Automotive Interior LED Lighting
The TPS61165TDBVRQ1 (AEC-Q100 qualified variant) supports automotive interior lighting applications such as dome lights, ambient lighting strips, and instrument panel backlights. Qualified to AEC-Q100, the automotive variant withstands the temperature and voltage stress of 12-V automotive electrical systems, including load-dump transients that exceed 18 V steady-state. The 38-V open-LED protection prevents SW-node ringing if an LED in the string fails open, a critical reliability feature in vibration-prone automotive environments. Use it to drive 4-8 series white LEDs from a 12-V battery rail, with PWM dimming for smooth brightness transitions on door-close and entry scenarios. Place bypass capacitors on both VIN and VOUT close to the IC, and verify the layout does not exceed CISPR 25 Class 5 EMI limits for conducted emissions on the automotive power bus.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS61165DBVR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS61165DBVT | TPS61165TDBVRQ1 | TPS61165DRVT | TPS61040DBVR | TPS61041DBVRG4 |
|---|---|---|---|---|---|---|
| Package | SOT-23-6 (DBV) | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same | WSON-6 (DRV) - different footprint | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Switch Current Limit | 1.2 A | 1.2 A | 1.2 A | 1.2 A | 400 mA (-67%) | 250 mA (-79%) |
| Switching Frequency | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1 MHz | 1 MHz |
| Output Voltage (max) | 38 V | 38 V | 38 V | 38 V | 28 V | 28 V |
| Dimming Interface | 1-Wire EasyScale + PWM | 1-Wire EasyScale + PWM | 1-Wire EasyScale + PWM | 1-Wire EasyScale + PWM | PWM only | PWM only |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No | No |
| Price (qty 1000) | $0.68 | $0.85 (smaller reel) | $1.10 (automotive) | $0.92 (WSON pkg) | $0.55 | $0.62 |
主な差別化要因
- Higher switch current limit (1.2 A) versus TPS61040 family （vs TPS61040DBVR)
- 1-Wire EasyScale digital dimming interface （vs TPS61041DBVRG4)
- Automotive-grade option available （vs TPS61165TDBVRQ1)
設計ノート
At maximum LED current of 1.2 A, the TPS61165DBVR dissipates significant power in the SOT-23-6 package due to its small thermal pad. At VIN=5V driving 10 LEDs in series (VOUT ~33V) at 0.7 A, the boost converter delivers about 23 W to the LED string while drawing 6.9 A from the 5-V rail (estimated, efficiency assumed 85%). The package thermal resistance of approximately 250 C/W means the junction temperature rises quickly above ambient. Provide at least 100 square mm of copper pour on the PCB top layer connected to GND, and use thermal vias to inner layers for additional heat dissipation. For continuous high-current operation, derate to 500-700 mA to maintain junction temperature below 125 C.
Place the input capacitor (1-10 uF ceramic, X5R or X7R) within 5 mm of the VIN pin to minimize switching noise injection. Route the SW trace as short and wide as possible, keeping it away from analog signal traces to avoid capacitive coupling. Keep the FB trace away from the SW node, and ground the IC's GND pin directly to a low-impedance ground plane. The sense resistor for LED current should be a 1% or better tolerance, low-inductance part to maintain current regulation accuracy. Place the rectifier diode close to the SW node with a tight loop to the output capacitor. Estimated: assumes standard SOT-23-6 thermal pad layout following JEDEC EIA/JESD51 standards.
Do not exceed the absolute maximum VIN rating of 20 V (datasheet) even though the datasheet specifies 18 V operation. The open-LED protection engages at 38 V on SW - if the LED string is removed during operation, the converter cannot deliver current to the output, and the SW node voltage rises until protection activates. Choose an output capacitor with voltage rating above 50 V to withstand open-LED events. The CTRL pin accepts both PWM and EasyScale commands - do not apply both simultaneously. Use a 1% feedback resistor divider for accurate LED current, and derate the inductor saturation current to at least 1.5 A to handle peak inductor current during load transients.
コンプライアンス情報
RoHS and REACH compliant per TI product page. Standard TPS61165DBVR is not AEC-Q100 qualified - select TPS61165TDBVRQ1 for automotive applications. Halogen-free per TI's standard green compliance.
