R1215 系列
PWM升压DC/DC控制器
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概述
The R1215 Series are low supply current CMOS PWM step-up DC/DC controllers. R1215 does not include an internal output transistor. By simply using a power MOS, an inductor, a diode, resistors, and capacitors as external components, a high-efficiency step-up DC/DC converter can be easily configured. The oscillator maximum duty cycle and soft start time as well as phase compensation can be set with external resistor and capacitor. (The oscillator maximum duty cycle does not include internal limit.)
The oscillator frequency can be selected from 700kHz or 1.4MHz. The input voltage of R1215 is lower than the R1212. The voltage range is 1.8V (2.0V) to 5.5V. The latch type protection circuit embedded into the device latches the external driver in the "OFF" state when the oscillator maximum duty cycle continues for a predetermined period of time setting by an external capacitor. R1215 also includes an under-voltage lockout circuit (UVLO).
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规格
消费 输入电压范围 2.0 V to 5.5 V (6.5 V) (R1215D002A/B)
1.8 V to 5.5 V (6.5 V) (R1215D002E/F)工作温度范围 -40°C to 85°C (125°C) 电源电流 Typ. 600 µA (700 kHz)
Typ. 900 µA (1.4 MHz)反馈电压 1.0 V 反馈电压精度 ±15 mV 反馈电压温度系数 Typ. ±150 ppm/°C 振荡器频率 Typ. 700 kHz, 1.4 MHz 最大占空比 Externally Adjustable 封装 SON-8 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
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Typical Application
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R1215D002E Efficiency vs. Output Current
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买入/样品
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线上购买
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买入/样品依赖/资料获取
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功能说明
TSD | 热关断电路 |
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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 |