Overview
The L5991AD13TR is a primary controller IC developed by STMicroelectronics using BCD60II technology. It is designed to implement offline or DC-DC power supply applications utilizing fixed frequency current mode control. This device is based on a standard current mode PWM controller and includes various advanced features to enhance performance and reliability in power management applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SO-16 |
| Marketing Status | Active |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| Switching Frequency | Up to 1 MHz |
| Maximum Duty Cycle | 100% and 50% limit |
| Maximum Operating Temperature | 150 °C |
| Maximum Supply Voltage | 20 V |
| Start-up Current | < 120 µA |
| Output Drive Current | 1 A (suitable for power MOSFET) |
Key Features
- Primary overcurrent fault detection with re-start delay
- Programmable soft start
- IN/OUT synchronization
- PWM UVLO with hysteresis
- Internal 100ns leading edge blanking of current sense
- Latched disable
- Programmable duty cycle
- Current-mode control PWM
- Standby function for oscillator frequency reduction
- Fully latched PWM logic with double pulse suppression
Applications
The L5991AD13TR is suitable for various power supply applications, including offline and DC-DC converters. It is particularly useful in industrial settings where reliable and efficient power management is crucial. The device can be used in flyback regulators, positive isolation capable output step-up/step-down DC-DC converters, and other power management systems.
Q & A
- What is the primary function of the L5991AD13TR?
The L5991AD13TR is a primary controller IC designed for implementing offline or DC-DC power supply applications using fixed frequency current mode control. - What are the available packages for the L5991AD13TR?
The L5991AD13TR is available in SO-16 packages. - What is the maximum switching frequency of the L5991AD13TR?
The maximum switching frequency is up to 1 MHz. - What is the maximum duty cycle limit of the L5991AD13TR?
The maximum duty cycle limit is 100% and 50%. - What is the maximum operating temperature of the L5991AD13TR?
The maximum operating temperature is 150 °C. - Does the L5991AD13TR have overcurrent protection?
Yes, it includes overcurrent protection with soft start intervention. - What is the standby function of the L5991AD13TR?
The standby function reduces the oscillator frequency when the converter is lightly loaded. - Is the L5991AD13TR RoHS compliant?
Yes, it is RoHS compliant with an Ecopack2 grade. - What is the start-up current of the L5991AD13TR?
The start-up current is less than 120 µA. - What is the output drive current capability of the L5991AD13TR?
The output drive current is 1 A, suitable for power MOSFETs.
