Bidirectional Synchronous PWM Controller for Battery Test and Formation
The ADP1974 is a constant frequency, voltage mode, synchronous, pulse-width modulation (PWM) controller for bidirectional dc-to- dc applications. The ADP1974 is designed for use in battery testing, formation, and conditioning applications with an external, high voltage field effect transistor (FET) half bridge driver, and an external control device such as the AD8450/AD8451. The device operates as a buck converter in battery charge mode and as a boost converter in discharge mode to recycle energy to the input bus.
The ADP1974 high voltage VIN supply pin can withstand a maximum operating voltage of 60 V and reduces the need for additional system supply voltages. The ADP1974 has integrated features such as precision enable, internal and external synchronization control with programmable phase shift, programmable maximum duty cycle, dead time control, and peak hiccup current-limit protection. Additional protection features include soft start to limit input inrush current during startup, precision enable, and thermal shutdown (TSD). The ADP1974 also has a COMP pin to provide external control of the PWM duty cycle and a FAULT pin that can disable the DH and DL outputs. These functions are compatible with the AD8450/AD8451 analog front-end (AFE) error amplifiers.
The ADP1974 is available in a 16-lead TSSOP package and is pin compatible with the ADP1972.
- Single and multicell battery formation and testing
- High efficiency battery test systems with recycle capability
- Battery conditioning (charging and discharging) systems
- Compatible with AD8450/AD8451 constant voltage (CV) and constant current (CC) analog front end error amplifier
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
The ADP1974-EVALZ is an open-loop evaluation board that can be used to test the features of the ADP1974. The ADP1974 is a constant frequency, voltage mode, bidirectional synchronous pulse-width modulation (PWM) controller for buck or boost, dc-to-dc, battery charge and discharge applications. When connected to external, high voltage field effect transistors (FET); a half bridge driver; and an external control device, such as the AD8450-EVALZ, the ADP1974-EVALZ can be used to evaluate the ADP1974 in a complete closed-loop application.
The ADP1974-EVALZ can be used to test internal features such as precision enable, pin selective battery charge or recycle mode operation, internal and external frequency synchronization control with programmable phase shift, PWM duty cycle control, programmable maximum duty cycle, programmable dead time, and programmable peak hiccup current limit. Additional protection features that can be evaluated include soft start, input voltage undervoltage lockout (UVLO), fault signaling, and thermal shutdown (TSD).
Complete specifications for the ADP1974 are available in the ADP1974 data sheet, which should be consulted in conjunction with user guide UG-883 when using the evaluation board.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.