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The device is a highly integrated solution for SMPS applications, with an LED pilot-lamp requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation.
The IC allows very efficient LED pilot-lamp driving which helps to reduce the standby consumption of the SMPS. It integrates a voltage reference, two op-amps (with OR-ed open-drain outputs), a low-side current sensing circuit and an LED pilot-lamp driver pin implemented with an open-drain mosfet driven by square waveform with 12.5% duty cycle at 1 kHz that allows reducing LED consumption.
The voltage reference, along with one op-amp, is the core of the voltage control loop. The current sensing circuit and the other op-amp make up the current control loop.
The external components needed to complete the two control loops are:
- a resistor divider that senses the output of the power supply and fixes the voltage regulation setpoint at the specified value
- a sense resistor that feeds the current sensing circuit with a voltage proportional to the DC output current; this resistor determines the current regulation setpoint and must be adequately rated in terms of power dissipation
- the frequency compensation components (R-C networks) for both loops.
The device is ideal for space-critical applications.Key Features
- Constant voltage and constant current control
- Very efficient LED pilot-lamp driver
- Wide operating VCCrange (3.5 V - 36 V)
- Low quiescent consumption: 250 μA
- Voltage reference: 2.5 V
- Voltage control loop accuracy ± 0.5%
- Current sense threshold: 50 mV
- Current control loop accuracy ± 4%
- Low external component count
- Open-drain output stage
- SOT23-6L package
サンプル & 購入
| 製品型番 | パッケージ | 梱包タイプ | 温度（℃） | Reference Voltage (V) (nom) | 製品ステータス | 概算価格（USS） | 数量 | ECCN (US) | Country of Origin | More info | 販売代理店からオーダー | STからオーダー | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小値 | max | ||||||||||||
| SEA05LTR | SOT23-6L | Tape And Reel | -40 | 150 | 2.5 |
アクティブ
|
0.2664 | 1000 | EAR99 | - | 在庫チェック | サンプル入手 | |
(*) 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
ビデオ
| 製品型番 | 製品ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | Material Declaration** |
|---|---|---|---|---|---|
| SEA05LTR |
アクティブ
|
SOT23-6L | インダストリアル | Ecopack2 |
|
SEA05LTR
Package:
SOT23-6LMaterial Declaration**:
(**) 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.
