XC9516 Series

Triple Output Power Supply for TFT-LCD

The XC9516 series can offer three different power supplies to TFT-LCD panels. These power supplies consist of a step-up DC/DC converter for a source driver, positive and negative charge pumps for a gate driver.

This IC has power-on sequences to keep inrush current as small when output voltage rises. The step-up DC/DC output can be used as power-on sequences with adding a P-channel FET as external component. Also, the FET can shut down a path to the power input line when CE pin is low.

Typical Application Circuit


Input Voltage Range 2.5V~5.5V
Maximum Output Voltage 19V(Step-up DC/DC)
Output Voltage Accuracy ±1.5%
Oscillation Frequency 300kHz~1.2MHz(Adjustable)
External MOSFET Gate Signal Output N-channel open drain
Switch Over Current Protection 1.3A
Soft-Start Internally fixed
Over Voltage Protection Step-up DC/DC 21V
Short Circuit Protection Positive and Negative Charge Pump
Thermal Shut Down 150℃
UVLO 1.87V
Operating Ambient Temperature -40℃~+85℃
Environmentally Friendly EU RoHS compliant, Pb free



Quality Reports


QuestionWhat does the standby mode mean in the case of the multi channel IC?

It means the state where the entire IC has been turned off. For Torex products, it means that the pin voltages of EN1 and EN2 are both 0V.

QuestionWhat is the soft-start function?

The function to soften the rise to prevent the inrush current.

QuestionWhat does CL mean?

Load capacitor. Other companies often refer to it as COUT.

QuestionWhat is the standby current?

The current that flows through the IC in the standby mode. The standby mode means the state where the IC has been turned off by the CE function.

QuestionWhat does the FB product mean?

An IC for which any output voltage can be set by the reference voltage of the FB pins and the external dividing resistor. The output voltage is determined by the RFB1 and RFB2 values, using the following formula: VOUT = Vref × (RFB1 + RFB2)/RFB2

QuestionHow does UVLO (under voltage lockout) work?

This circuit forcibly turns off the driver transistor when VIN drops below the UVLO voltage. If the input voltage recovers to the value which is equal to the specified value or more, UVLO will be released to resume the switching operation. It is resumed by the soft-start function. The paused state by UVLO is not the shutdown. The pulse output is stopped, but the internal circuit is operating.