ISL6845IBZ-T

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The ISL6845IBZ-T is a high-performance, single-phase switch-mode power supply controller optimized primarily for low power (<25 W) dc-dc converters operating in either open loop or closed loop voltage mode environments. It is suitable for use in step-up, step-down and inverting applications as well as in other power topologies where good dynamic performance is required.

The ISL6845IBZ-T uses an innovative current-mode architecture based on advanced artificial intelligence techniques. It combines the advantages of linear, analog and digital designs to create an ultra-fast, high-efficiency and power-efficient single-channel switch-mode power supply controller. The integrated features make the ISL6845IBZ-T suitable for low power (<25 W) dc-dc applications.

The ISL6845IBZ-T features Automatic Voltage Mode (AVM) for accurate voltage regulation and cycle-by-cycle current limiting for improved system protection and durability. The wide pulse-width range of the control loop provides robust transient response for avionics, computing and networking applications. The external resistive divider enables closed loop applications with integrated feedback.

The ISL6845IBZ-T offers several advantages over traditional linear and pulse-width modulation (PWM) controllers. It can be programmed to optimize efficiency and minimize electromagnetic interference (EMI) while meeting System Level specifications. It also offers programmable soft-start and external voltage compensation for improved reliability and transient response.

The ISL6845IBZ-T is ideal for low power (<25 W) point-of-load dc-dc converters and high power factor SMPSs requiring fast transient response and high efficiency. It can also be used in inverters and other topologies where a wide pulse-width range and linear current-mode control are required. In addition, the ISL6845IBZ-T provides integrated diode emulation- and high frequency planar magnetics for improved system performance and low cost.

The ISL6845IBZ-T is ideal for applications in which fast and precise voltage control with minimum ripple and overshoot is desired. It features wide input voltage range with single output voltage programming and SmartStart software for improved system performance. These features enable the user to program the converter for optimal voltage control in all operating conditions.

The ISL6845IBZ-T provides advanced power fail/undervoltage (PFA/UV) protection. PFA detection during operation helps prevent output overshoot on startup and subsequent power-off. An integrated detect and latch circuit helps prevent voltages from oscillating during undervoltage conditions and reduce power demands under power-down. The ISL6845IBZ-T also features overvoltage, overcurrent and, thermal protection.

The unique current-mode architecture of the ISL6845IBZ-T enables cycle-by-cycle current limiting for improved system protection and dynamic response. It also features a programmable frequency range and adjustable dead time to optimize efficiency and minimize EMI. Furthermore, the controller offers a variety of external compensation and protection networks, including a power fail/undervoltage protection circuit.

Overall, the ISL6845IBZ-T is an advanced, power-efficient, single-channel switch-mode power supply controller with integrated features suitable for low power (<25 W) point-of-load dc-dc converters and high power factor SMPSs. Its current-mode architecture enables fast transient response and high efficiency, while its programmable frequency range and adjustable dead-time optimization support improved system performance. The integrated PFA/UV protection helps ensure reliable protection.

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