S-8337AAAB-P8T1G

Voltage - Supply (Vcc/Vdd):	1.8 V ~ 6 V
Supplier Device Package:	8-SON (A) (2.9x2.8)
Package / Case:	8-SMD, Flat Lead
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	89%
Frequency - Switching:	257.4kHz ~ 1.134MHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Output Type:	Transistor Driver
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction

The S-8337AAAB-P8T1G is a type of DC DC switching controller designed for current-mode operation over an input voltage range of 4.5V to 30V and an output current range of 0V to 8A. It has multiple features that enable the efficient operation of smart chargers, such as adjustable over current protection, adjustable soft-start, adjustable PWM frequency and programmable dead time control. This article will discuss the application fields and working principle of the S-8337AAAB-P8T1G DC DC switching controller.

Application Fields

The S-8337AAAB-P8T1G DC DC switching controller can be used in a variety of applications including buck, boost, buck-boost, and multi-phase DC-DC converters for flash memory, microcontrollers, SoCs, CPUs, and PLCs. It is also suitable for power converters in applications such as automotive systems, active filters, LED lighting, Ethernet switches, and traction charging.The controller has a wide operational temperature range which allows it to be used in a range of environments. The wide output voltage range and adjustable soft-start allows for efficient operation in high-efficiency converters. The high-side and low-side MOSFET drivers make the device suitable for use in high-frequency switching applications.

Working Principle

The S-8337AAAB-P8T1G DC DC switching controller is a synchronous-mode PWM (pulse-width modulation) controller that uses a current-mode control. It operates in a mode known as peak current-mode control (PCMC) which allows for tighter control of output current. The device uses an internal compensation network and a pulse generator to generate a pulse-width modulated drive signal for the power switching devices. The frequency of the pulse-width modulation is adjustable and can range from 100MHz to 250MHz, giving the device the ability to operate in high-frequency applications. The adjustable soft-start feature ensures the output voltage is ramped up slowly in order to prevent overshoot. The adjustable over-current protection feature ensures that the output current is limited to the programmed value in order to prevent costly damage. The programmable dead time control feature allows for efficient power conversion when the voltage is below peak efficiency as it allows for an extended off-time period.

Conclusion

The S-8337AAAB-P8T1G DC DC switching controller is a synchronous-mode PWM controller designed for current-mode operation over an input voltage range of 4.5V to 30V and an output current range of 0V to 8A. It has features such as adjustable over current protection, adjustable soft-start, adjustable PWM frequency, and programmable dead time control, which make it suitable for use in a variety of applications including flash memory, microcontrollers, SoCs, CPUs, and PLCs. The controller’s wide operational temperature range and adjustable soft-start enable it to be used in high-efficiency converters, while its high-side and low-side MOSFET drivers make it suitable for use in high-frequency switching applications. The adjustable over-current protection and programmable dead time control features, ensure efficient power conversion and prevent costly damage.

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