Strong species of prairie side 6W switching power supply chip U6215

With the 618 promotion activities in full swing, chip merchants are also eager to move. Since you want to choose a switching power supply chip, what brand and model is your truly safe and convenient one-step choice?

The primary side 6W switching power supply chip U6215 is a high-performance, low-cost primary side control power switch with a built-in high-voltage power transistor, which can provide high-precision constant voltage and constant current output performance, especially suitable for small Power offline charger application. Using U6215 can work without abnormal sound, while ensuring excellent dynamic performance. With the integrated line loss compensation function, high-performance constant voltage output performance can be obtained.

The original 6W switching power supply chip U6215 integrates a variety of protection functions: such as VDD undervoltage protection (UVLO), VDD overvoltage protection (OVP), cycle-by-cycle current limiting protection (OCP), short circuit protection ( FB SLP), Output Over-Voltage Protection (FB OVP), Over-Temperature Protection (OTP) and VDD Clamp, etc.

U6215 is also integrated with power system single point failure protection, FB pull-up resistor open circuit, FB pull-down resistor open circuit, FB pull-down resistor short circuit, output diode or SR open circuit, output diode or SR short circuit, transformer winding Protection can be realized under fault conditions such as short circuit and Rcs open circuit.

Recommended typical power of primary side 6W switching power supply chip U6215 (85-265Vac):

● U6215A: 6W

● U6215B: 5W

● U6215C: 3W

The pin name is:

1 VDD chip power supply pin.

2 FB System feedback pin. The auxiliary winding voltage is divided by resistors and then sent to the FB pin for CV mode output voltage control and CC mode output current control.

3 FB

4 CS Current sampling input pin.

5-6 C Built-in power transistor collector.

7 GND Chip reference ground.

Before the chip starts working, the primary side 6W switching power supply chip U6215 only consumes a typical start-up current of 1.1uA. The ultra-low start-up current can help increase the start-up resistance to reduce standby power consumption .

When the VDD voltage exceeds the turn-on voltage (typical value 10V), U6215 starts to work and the chip operating current rises to 0.18mA (typical value).

Afterwards, the VDD capacitor continues to supply power to the chip until the output voltage is established, and the auxiliary winding supplies power to the chip. Once the chip enters the ultra-low frequency working mode, the working current of U6215 is further reduced to 0.14mA (typical value) to help reduce the system standby power consumption.