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TK11840 Datasheet – DC/DC Controller

Manufacturer: AKM (Asahi Kasei Microdevices)

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General Description

Order Size TK11840: Part Name L: SOT23L-8 Package TL: Tape&Reel, Left -GH: PB-Free&Halogen Free 1,300 pcs.

/Reel Page 118 2010 AUTUMN This datasheet has been downloaded from http://www.digchip.com at this page Block Diagram, Standard Application EaIn 1 Error Amplifier 0.5V SCP 2 Soft Start Short Circuit Protection VCC 3 BR/CTL 4 1.3V Reference Voltage Supply PWM Comparator Oscillator Output Drive Control Circuit 8 FB 7 OSC 6 GND 5 Out In VIn CIn 1 EaIn 2 SCP CSCP 3 VCC 4 BR/CTL Rb FB 8 CFB OSC 7 Ct GND 6 Rt Out 5 Out COut W-LED R1 CTL DCDC Controller 11 2010 AUTUMN Page 119

Overview

TK11840 DCDC Controller, 1ch, Step-up, Inductive DCDCコントローラ、1ch、昇圧、インダクティブ Feature „ Adjustable output voltage „ 出力電圧調整可能 „ External Power Transistor „ パワートランジスタ外付け „ High speed adjustable OSC (Up to 1MHz) „ 高速動作が可能 (最大1MHz) „ Internal soft start circuit „ ソフトスタート回路内蔵 „ Internal timer-latch type „ タイマーラッチ式短絡検出回路内蔵 short circuit detection „ Totem-pole type output whose current is „ 出力はトーテムポール形式でオン･オフ電流 adjustable(correspond to NPN transistor) を調整可能 (npnトランジスタ対応) „ On/Off control available „ スタンバイ機能内蔵 „ Low Quiescent Current (5mA@no load) „ 電源電流が少ない (無負荷時5mA) „ Small 8 Pin SOT23L-8 package „ パッケージが小さい (SOT23L-8) „ Operating Voltage Range VOP=1.8 to 10V „ Operating Temp Range TOP=-20 to +85°C „ Power Dissipation PD=400mW „ 動作電圧範囲VOP=1.8~10V „ 動作温度範囲TOP=-20~+85°C „ 許容消費電力PD=400mW Characteristics Part Name Number of DCDC TK11840 1ch fOSC Up to 1MHz Number of LED in serial connection 2 LED or more ILED.

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