The XC9133 series is a step-up DC/DC converter chip with fixed operating frequency and constant output current. It is very suitable for driving the backlight LED of electronic devices such as mobile phones, PDAs, digital cameras, etc.
The output voltage of the XC9133 series can reach 17.5V. When the input voltage is 3.2V, the XC9133 series chip can drive 4 LEDs in series. When the input voltage is 2.5V, the XC9133 series chip can drive two parallel columns of LEDs, with 3 LEDs in series in each column.
Adding a set of PWM control signals to the CE pin of the XC9133 series can control the brightness of the LED. The XC9133 series has an operating frequency of up to 1.0MHz and a very low reference voltage, which greatly reduces power consumption and has high efficiency.
In addition, the XC9133 series has a built-in power switch tube with an on-resistance of 2.0Ω, and only uses a very small ceramic capacitor (0.22uF) as the load capacitor.
The XC9133 series also has a built-in fault detection circuit. When the output voltage is too high, the power switch inside the chip will stop working through the feedback circuit to prevent damage to the LED.
Package:
Features:
Typical application circuit:
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