User's Guide
- Reference Board BM2P121X-EVK-001
The PWM type DC/DC converter for AC/DC provides an optimum system for all products that include an electrical outlet. It enables simpler design of a high effective converter specializing in non-isolation. By a built-in startup circuit that tolerates 650V, this IC contributes to low power consumption. A current detection resistor as internal device realizes the small power supply designs. Since a current mode control is utilized, the current can be restricted in each cycle and an excellent performance is demonstrated in the bandwidth and transient response. The switching frequency is fixed to 65kHz. A frequency hopping function is also on chip, and it contributes to low EMI. In addition, a built-in super junction MOSFET which tolerates 650V makes the design easy.
FET
Integrated
Controller Type
PWM
Vin1(Min.)[V]
9.5
Vin1(Max.)[V]
12.96
Start Circuit [V]
650.0
SW frequency(Max.)[kHz]
65.0
Vcc OVP
Auto Restart
BR PIN
No
On Resistor (MOSFET)[Ω]
1.5
Channel
1
Light Load mode
Yes
EN
No
Soft Start
Yes
Thermal Shut-down
Yes
Under Voltage Lock Out
Yes
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
105
The BM2P121X-EVK-001 evaluation board outputs 12 V voltage from the input of 90 Vac to 264 Vac. The output current supplies up to 0.75 A. The BM2P121X which is PWM method DC/DC converter IC built-in 650 V MOSFET is used.