R1287 系列
PWM/VFM,双通道升压/反转DC/DC转换器,带同步整流器功能,用于LCD

下载数据表

  • 概述

    The R1287 Series are CMOS-based PWM/VFM dual-channel step-up/inverting DC/DC converters with synchronous rectifier for LCD.

    The R1287 includes a soft-start circuit, an under-voltage lockout circuit (UVLO), a latch-type short circuit protection, and a thermal shutdown circuit.

    By simply using two inductors and three capacitors as external components, a high-efficiency step-up/inverting DC/DC converter can be easily configured.

    The R1287 provides two control types: the PWM control and the PWM/VFM auto switching control.

    Both CH1 and CH2 can independently control the ON/ OFF control and freely set the starting sequence and shutdown sequence.

    Both CH1 and CH2 own an auto-discharge function which actively discharges the output voltage to ground within a short time in shutdown mode.

    The R1287 is used for the application of the LCD.

  • 规格
    消费
    输入电压范围 2.5 V to 5.5 V (6.0 V)
    工作温度范围 -40°C to 85°C (125°C)
    电源电流 Typ. 470 µA
    待机电流 Typ. 0.1 µA
    输出电压范围 Boost: 4.5 V to 5.8 V (Internally Fixed or Externally Configurable)
    Inverting:
    -4.5 V to -5.8 V (Internally Fixed)
    -4.5 V to -6.0 V (Externally Configurable)
    输出电压精度 Boost: ±0.9% / Inverting; ±1%
    反馈电压 Boost: 1.0 V / Inverting; 0 V
    反馈电压精度 Boost: ±15 mV / Inverting: ±30 mV
    输出电流 Boost , Inverting: 200 mA (B/D/F/H), 100 mA (C/G)
    振荡器频率 Boost: 900 kHz (B/F), 300 kHz (C/G), 1 MHz (D/H)
    Inverting: 1.1 MHz (B/F), 300 kHz (C/G), 1 MHz (D/H)
    最大占空比 Boost , Inverting: Typ. 90% (B/D/F/H), Typ. 97% (C/G)
    封装 WLCSP-12-P1, DFN3030-12

    保护回路/功能

    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • 技术资料
    • R1287xxxxy Typical Application (Fixed Output Voltage Type)

      R1287xxxxy Typical Application (Fixed Output Voltage Type)

      C1(CIN),C2(COUTP),C3(COUTN): 10µF

    • R1287x001B Efficiency vs. Output Current

      R1287x001B Efficiency vs. Output Current

    • R1287x001C Efficiency vs. Output Current

      R1287x001C Efficiency vs. Output Current

  • 品质&封装
    • 有关产品的详细信息,请参见数据表。
    • 封装文件包括封装尺寸,卷带规格,卷带盘尺寸,功耗和建议的焊盘图案。
    • 请联系我们或我们的代理商以获取未发布的可靠性信息。

下载数据表

功能说明

TSD 热关断电路
ILX LX Current Limit Function
OCP 过流保护
OVP 过压保护
UVLO 欠压锁定功能
OVLO Overvoltage Lockout Protection
Reverse 反向电流保护电路
Shutdown 关机功能
Soft Start 软启动功能
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge 自动放电功能
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty 最大占空比
Ext. Phase 外部可调相位补偿
LED Adjust LED High-speed Dimming Control

用以下条件检索类似商品

分类:DC / DC开关稳压器

拓扑结构 Boost,Inverting
输入电压
min (V)
2.5
输入电压
max (V)
5.5
输出电压
min (V)
4.5
输出电压
max (V)
5.8
输出电流
(mA)
200
消费电流
(µA)
470