Overview
The NCP12700BMTTXG, produced by onsemi, is a fixed frequency, peak current mode PWM (Pulse Width Modulation) controller designed for implementing single-ended power converter topologies. This device features a high voltage startup regulator capable of operating over a wide input range of 9 to 200 V, making it suitable for various industrial, medical, telecom, and transportation applications. The controller includes a programmable oscillator, integrated slope compensation, and a suite of protection features to ensure robust and safe operation.
Key Specifications
| Parameter | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| High Voltage Startup Voltage | VIN(MAX) | - | - | 200 | V |
| Supply Voltage | VCC(MAX) | -0.3 | - | 30 | V |
| Supply Current | ICC(MAX) | - | - | 50 | mA |
| DRV Voltage | VDRV(MAX) | -0.3 | - | VDRV(high) | V |
| DRV Current (Peak) | IDRV(MAX) | - | - | 3.25 | A |
| FLT Voltage | VFLT(MAX) | - | - | VCC + 1.25 | V |
| FLT Current | IFLT(MAX) | - | - | 10 | mA |
| Maximum Junction Temperature | TJ(MAX) | - | - | 150 | °C |
| Operating Temperature Range | TJ | -40 | - | 125 | °C |
| Oscillator Frequency | FOSC | 100 kHz | - | 1 MHz | - |
| DRV Rise Time | tDRV(rise) | 6 | 10 | 15 | ns |
| DRV Fall Time | tDRV(fall) | 2.5 | 4 | 10 | ns |
Key Features
- Wide Input Range: Operates over a wide input range of 9 to 200 V, supporting various applications without the need for external components.
- High Voltage Startup Regulator: Capable of supplying at least 15 mA to provide temporary bias to VCC during system startup.
- Current Mode Control with Integrated Slope Compensation: Prevents subharmonic oscillations in continuous conduction mode (CCM).
- Single Resistor Programmable Oscillator: Allows for easy and flexible frequency adjustment from 100 kHz to 1 MHz.
- Adjustable Soft-Start: User-adjustable soft-start ramp to manage startup conditions.
- Input Voltage UVLO Protection: Includes hysteresis and a shutdown comparator for external disable and low quiescent state.
- Gate Driver: 1 A / 2.8 A source/sink gate driver capable of driving various types of MOSFETs.
- Fault Protections: Includes user-adjustable over-power protection, overload protection with a 30 ms timer, NTC-compatible fault interface for thermal protection, output over-voltage protection, and fault auto-recovery mode.
Applications
- Single-ended Power Converters: Suitable for CCM/DCM flyback and forward converters.
- Telecommunications Power Converters: Ideal for telecom DC-DC modules.
- Industrial Power Converter Modules: Used in various industrial power conversion applications.
- Transportation & Railway Power Modules: Applicable in transportation and railway DC-DC modules.
- Power over Ethernet Powered Devices (PoE PD): Suitable for PoE PD applications.
Q & A
- What is the input voltage range of the NCP12700BMTTXG?
The input voltage range is 9 to 200 V.
- What is the maximum supply current of the NCP12700BMTTXG?
The maximum supply current is 50 mA.
- What is the maximum junction temperature of the NCP12700BMTTXG?
The maximum junction temperature is 150°C.
- Does the NCP12700BMTTXG have built-in slope compensation?
Yes, it integrates slope compensation to prevent subharmonic oscillations.
- What types of protection features does the NCP12700BMTTXG offer?
The device offers user-adjustable over-power protection, overload protection, NTC-compatible fault interface for thermal protection, output over-voltage protection, and fault auto-recovery mode.
- Can the oscillator frequency be programmed?
Yes, the oscillator frequency can be programmed from 100 kHz to 1 MHz using a single resistor.
- What is the purpose of the UVLO pin?
The UVLO pin provides input voltage UVLO protection with hysteresis and a shutdown comparator for external disable and low quiescent state.
- What is the maximum DRV current of the NCP12700BMTTXG?
The maximum DRV current is 3.25 A.
- Does the NCP12700BMTTXG support soft-start functionality?
Yes, it supports user-adjustable soft-start ramp.
- What are some typical applications of the NCP12700BMTTXG?
Typical applications include single-ended power converters, telecommunications power converters, industrial power converter modules, transportation and railway power modules, and Power over Ethernet powered devices (PoE PD).
