DATA SHEET www.onsemi.com MARKING Integrated DC-DC DIAGRAMS Converter - Power over 8 Micro8 1030 8 Ethernet and Telecom DM SUFFIX AYW CASE 846A 1 1 NCP1030, NCP1031 8 The NCP1030 and NCP1031 are a family of miniature highvoltage SO8 N1031 D SUFFIX ALYW monolithic switching regulators with onchip Power Switch and Startup 8 CASE 751 Circuits. The NCP103x family incorporates in a single IC all the active 1 1 power, control logic and protection circuitry required to implement, with minimal external components, several switching regulator applications, NCP DFN8 such as a secondary side bias supply or a low power dcdc converter. 1031 MN SUFFIX This controller family is ideally suited for 48 V telecom, 42 V automotive ALYW CASE 488AF 1 and 12 V input applications. The NCP103x can be configured in any singleended topology such as forward or flyback. The NCP1030 is A = Assembly Location targeted for applications requiring up to 3 W, and the NCP1031 is L = Wafer Lot targeted for applications requiring up to 6 W. Y = Year The internal error amplifier allows the NCP103x family to be easily W = Work Week configured for secondary or primary side regulation operation in = PbFree Package isolated and nonisolated configurations. The fixed frequency oscillator (Note: Microdot may be in either location) is optimized for operation up to 1 MHz and is capable of external frequency synchronization, providing additional design flexibility. In PIN CONNECTIONS addition, the NCP103x incorporates individual line undervoltage and 1 8 overvoltage detectors, cycle by cycle current limit and thermal GND V DRAIN 2 7 shutdown to protect the controller under fault conditions. The preset C V T CC current limit thresholds eliminate the need for external sensing 3 6 UV V FB components. 4 5 COMP OV Features (Top View) On Chip High 200 V Power Switch Circuit and Startup Circuit Internal Startup Regulator with Auxiliary Winding Override GND V Operation up to 1 MHz DRAIN External Frequency Synchronization Capability C V T CC EP Flag Frequency Folddown Under Fault Conditions UV V FB Trimmed 2% Internal Reference COMP OV Line Undervoltage and Overvoltage Detectors (Top View) Cycle by Cycle Current Limit Using SENSEFET Active LEB Circuit Overtemperature Protection ORDERING INFORMATION See detailed ordering and shipping information in the package Internal Error Amplifier dimensions section on page 19 of this data sheet. PbFree Packages are Available Typical Applications POE (Power Over Ethernet)/PD. Refer to Application Note AND8247. Secondary Side Bias Supply for Isolated dcdc Converters Stand Alone Low Power dcdc Converter Low Power Bias Supply Low Power Boost Converter Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: August, 2021 Rev. 12 NCP1030/DNCP1030, NCP1031 R GND SENSE V DRAIN Disable I Current Limit + START LEB Internal Bias Comparator 7.5 V/10 V V I CC 1 Thermal C Ramp T + 16 V Shutdown C T 50 mV S + Reset 10 V 10 V Dominant Q + Latch 3.0 V/3.5 V R + I = 3I 6.5 V 2 1 UV One Shot SQ IO Pulse Reset Dominant + 10 V Error Amplifier Latch 2.5 V VFB R + OV PWM Latch + 10 V + PWM Comparator 2.5 V 10 V 4.5 V COMP 2 k 10 V Figure 1. NCP1030/31 Functional Block Diagram FUNCTIONAL PIN DESCRIPTION Pin Name Function Description 1 GND Ground Ground reference pin for the circuit. 2 C Oscillator Frequency An external capacitor connected to this pin sets the oscillator frequency up to 1 MHz. T Selection The oscillator can be synchronized to a higher frequency by charging or discharging C to trip the internal 3.0 V/3.5 V comparator. If a fault condition exists, the power T switch is disabled and the frequency is reduced by a factor of 7. 3 V Feedback Input The regulated voltage is scaled down to 2.5 V by means of a resistor divider. FB Regulation is achieved by comparing the scaled voltage to an internal 2.5 V reference. 4 COMP Error Amplifier Compensation Requires external compensation network between COMP and V pins. This pin is FB effectively grounded if faults are present. 5 OV Line Overvoltage Shutdown Line voltage (V ) is scaled down using an external resistor divider such that the OV in voltage reaches 2.5 V when line voltage reaches its maximum operating voltage. 6 UV Line Undervoltage Shutdown Line voltage is scaled down using an external resistor divider such that the UV voltage reaches 2.5 V when line voltage reaches its minimum operating voltage. 7 V Supply Voltage This pin is connected to an external capacitor for energy storage. During Turn On, the CC startup circuit sources current to charge the capacitor connected to this pin. When the supply voltage reaches V , the startup circuit turns OFF and the power switch is CC(on) enabled if no faults are present. An external winding is used to supply power after initial startup to reduce power dissipation. V should not exceed 16 V. CC 8 V Power Switch and This pin directly connects the Power Switch and Startup Circuits to one of the DRAIN Startup Circuits transformer windings. The internal High Voltage Power Switch Circuit is connected between this pin and ground. V should not exceed 200 V. DRAIN www.onsemi.com 2 + + + + +