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KP3111
KP3111 High-performance, low-cost offline PWM power switch KP3111 is a non-isolated, highly integrated, and low-cost PWM power switch, suitable for buck and buck-boost circuits. KP3111 adopts a high-voltage single-wafer process, integrating a 500V high-voltage MOSFET and a controller using switch-mode peak current control on the same wafer. It can ensure a high-precision 5V default output within the full voltage input range. Inside the chip, the oscillator frequency is fixed at 31kHz and has a frequency dithering function, optimizing the EMI effect while ensuring output power. Meanwhile, the chip is designed with light and heavy load modes, easily achieving standby power consumption below 50mW. KP3111 integrates complete protection functions: VDD undervoltage protection, cycle-by-cycle current limit, over-temperature protection, overload protection, and short-circuit protection.
Category：
- Product Description
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- Commodity name: KP3111
- 封装: SOP-8, TO-92 and SOT23-3L
- 品牌: Biyi Microelectronics
KP3111 High-performance, low-cost offline PWM power switch KP3111 is a non-isolated, highly integrated, and low-cost PWM power switch, suitable for buck and buck-boost circuits. KP3111 adopts a high-voltage single-wafer process, integrating a 500V high-voltage MOSFET and a controller using switch-mode peak current control on the same wafer. It can ensure a high-precision 5V default output within the full voltage input range. Inside the chip, the oscillator frequency is fixed at 31kHz and has a frequency dithering function, optimizing the EMI effect while ensuring output power. Meanwhile, the chip is designed with light and heavy load modes, easily achieving standby power consumption below 50mW. KP3111 integrates complete protection functions: VDD undervoltage protection, cycle-by-cycle current limit, over-temperature protection, overload protection, and short-circuit protection.
Main Features
• High precision 5V default output
• Integrated 500V high-voltage MOSFET and high-voltage startup circuit
• Ultra-low system cost
• Supports buck and buck-boost circuits
• Switch-mode peak current mode control
• Ultra-low standby power consumption less than 50mW
• Ultra-low operating current, supports small VDD capacitor
• Integrated 31KHz oscillator with spread spectrum function
• Integrated soft-start circuit
• Integrated protection functions:
• Overload protection (OLP)
• Overtemperature protection (OTP)
• Cycle-by-cycle current limit (OCP)
• Leading edge blanking (LEB)
• VDD undervoltage protection
• Package types SOP-8, TO-92 and SOT23-3L
Product Model
Topology
Maximum Output Current
(mA)Output Characteristics
Withstand Voltage
On-resistance
(Ω)Startup Method
Standby Power Consumption
(mW)VDDmax
(V)Maximum Frequency
(kHz)Package
KP3111
Buck/Buck-Boost
200
DCM&CCM
CV
500V MOS
13
High Voltage Startup
<50
8.5
30
SOT23-3
KP3111
Buck/Buck-Boost
220
DCM&CCM
CV
500V MOS
13
High Voltage Startup
<50
8.5
30
TO-92
KP3111
Buck/Buck-Boost
220
DCM&CCM
CV
500V MOS
13
High Voltage Startup
<50
8.5
30
SOP-8
Product Message
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