- 105V/2A half-bridge gate driver
- The synchronous rectifier has a programmable delay control output
- The synchronous rectifier is turned off in shutdown mode.
- Reduce dead bands between high-side and low-side drives with higher maximum duty cycles.
- High voltage (105V) start-up regulator
- Limit two with line feed-forward and volt voltage mode control
- Resistor programming, 2MHz capable oscillator
- Programmable input undervoltage lockout and overvoltage protection
- Internal thermal shutdown protection
- Adjustable soft-start
- Multifunctional dual-mode overcurrent protection and hiccup delay timer
- Cycle-by-cycle overcurrent protection
- Direct photocoupler interface
- 5V reference output
illustrate
The LM5035B half-bridge controller/gate driver contains the necessary functions to implement line feed-forward voltage mode control for power converters in half-bridge topologies.
The LM5035B is a variant of the LM5035A half-bridge PWM controller function. The LM5035B offers a higher maximum duty cycle and a higher start-up regulator output than the LM5035A or LM5035. In addition, the LM5035B with synchronous rectifier drive output is held low in shutdown mode.
While the LM5035, LM5035A and LM5035B include floating high-side gate drivers, which are capable of operating supply voltages up to 105V. Both high-side and low-side gate drivers are 2A with peak capability. An internal high-voltage start-up regulator is included, as well as programmable undervoltage lockout (UVLO) and overvoltage protection (OVP). The oscillator is programmed to frequencies up to 2MHz with a single resistor. The oscillator can also be synchronized to an external clock. Current sense input, a programmable timer provides cycle-by-cycle current limit and regulation of hiccup mode overload LM5035 protection. The difference between LM5035A, LM5035B, and LM5035C is in summary
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