Overview
The LM5122QMHE/NOPB is a wide-input synchronous boost controller manufactured by Texas Instruments. This device is designed for high-efficiency synchronous boost regulator applications and features a peak-current-mode control method. It is capable of operating over a wide input voltage range of 3 V to 65 V, with a start-up voltage of 4.5 V, and can produce output voltages up to 100 V. The LM5122QMHE/NOPB includes robust 3-A integrated gate drivers and supports free-run and synchronizable switching frequencies up to 1 MHz. Additional features include thermal shutdown protection, hiccup-mode overload protection, and programmable soft start and line undervoltage lockout.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 3 V (4.5 V for Start-Up) | - | 65 V | V |
| Output Voltage (VOUT) | - | - | 100 V | V |
| Switching Frequency | - | - | 1 MHz | Hz |
| Maximum Duty Cycle | - | - | 100 % | % |
| Gate Driver Current | - | - | 3 A | A |
| Junction Temperature (TJ) | -40 °C | - | 125 °C | °C |
| Shutdown Quiescent Current | 9 | 17 | - | µA |
| VCC Regulation Voltage | 6.9 | 7.6 | 8.3 | V |
Key Features
- Peak-current-mode control with inherent line feed forward and cycle-by-cycle current limiting.
- Robust 3-A integrated gate drivers with adaptive dead-time control.
- Internal charge pump allowing 100% duty cycle for high-side synchronous switch (bypass operation).
- 180° phase shifted clock output for easy multi-phase interleaved configuration.
- Thermal shutdown protection, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout).
- Programmable soft start, slope compensation, and skip-cycle mode to reduce standby power).
- Optional diode-emulation mode for improved efficiency at light load conditions).
- Inductor DCR current sensing capability and multi-phase capability).
- Thermally enhanced 20 or 24-pin HTSSOP package).
Applications
- 12-V, 24-V, and 48-V power systems).
- Automotive start-stop systems).
- Audio power supplies).
- High-current boost power supplies).
- CNC systems, servo drive systems, digital display devices, linear guides, ball screw pairs, computer applications, network technology, automation technology, and various precision measuring instruments).
Q & A
- What is the input voltage range of the LM5122QMHE/NOPB?
The input voltage range is from 3 V to 65 V, with a start-up voltage of 4.5 V).
- What is the maximum output voltage of the LM5122QMHE/NOPB?
The maximum output voltage is up to 100 V).
- What is the maximum switching frequency of the LM5122QMHE/NOPB?
The maximum switching frequency is up to 1 MHz).
- Does the LM5122QMHE/NOPB support multi-phase operation?
Yes, it supports multi-phase operation with a 180° phase shifted clock output).
- What protection features does the LM5122QMHE/NOPB have?
It includes thermal shutdown protection, hiccup-mode current limit, and adjustable line undervoltage lockout).
- What is the maximum duty cycle of the LM5122QMHE/NOPB?
The maximum duty cycle is 100 %).
- Can the LM5122QMHE/NOPB operate in diode-emulation mode?
Yes, it can be configured to operate in diode-emulation mode for improved efficiency at light load conditions).
- What is the package type of the LM5122QMHE/NOPB?
The package type is thermally enhanced 20 or 24-pin HTSSOP).
- What are some common applications of the LM5122QMHE/NOPB?
Common applications include 12-V, 24-V, and 48-V power systems, automotive start-stop systems, audio power supplies, and high-current boost power supplies).
- Does the LM5122QMHE/NOPB support external VCC supply?
Yes, it allows for an external VCC supply).
