Overview
The ADP1972ARUZ-R7, produced by Analog Devices Inc., is a constant frequency, voltage mode, pulse-width modulation (PWM) controller designed for buck or boost, dc-to-dc, asynchronous applications. This controller is particularly suited for asynchronous battery testing applications, operating as a buck converter in battery charge mode and as a boost converter in recycle mode to recycle energy back to the input bus. It is used in conjunction with an external high voltage field effect transistor (FET), half bridge driver, and an external control device such as the AD8450.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 6 V to 60 V | V |
| Operating Frequency Range | 50 kHz to 300 kHz | Hz |
| Maximum Duty Cycle | 98% | % |
| Package Type | 16-lead TSSOP | - |
| Internal LDO Regulator Output | 5 V (typical) | V |
| Peak Hiccup Current Limit | Programmable | - |
| Soft Start Control | Capacitor controlled | - |
| Synchronization | Adjustable phase shift, input/output | - |
Key Features
- Programmable maximum duty cycle and soft start
- Peak hiccup current limit protection
- Input voltage undervoltage lockout (UVLO) protection and thermal shutdown (TSD) protection
- Synchronization output or input with adjustable phase shift
- High input voltage range (6 V to 60 V) and high voltage supply pin (VIN) capable of withstanding up to 60 V
- Internal 5 V LDO regulator for biasing control circuitry and external use
- External FET driver compatibility with 5 V logic signals
Applications
- PWM battery test systems with recycle capability, including hybrid vehicles, PCs, and camera batteries
- Compatible with AD8450 constant voltage (CV) and constant current (CC) monitors
Q & A
- What is the primary function of the ADP1972ARUZ-R7?
The ADP1972ARUZ-R7 is a PWM controller designed for buck or boost, dc-to-dc, asynchronous applications, particularly in battery testing and recycling.
- What is the input voltage range of the ADP1972ARUZ-R7?
The input voltage range is from 6 V to 60 V.
- What is the operating frequency range of the ADP1972ARUZ-R7?
The operating frequency range is from 50 kHz to 300 kHz.
- What type of protection does the ADP1972ARUZ-R7 offer?
The device offers peak hiccup current limit protection, input voltage undervoltage lockout (UVLO) protection, and thermal shutdown (TSD) protection.
- How does the synchronization feature work on the ADP1972ARUZ-R7?
The synchronization feature allows for adjustable phase shift and can be used as either an input or output to synchronize with external clocks or other channels.
- What is the purpose of the internal LDO regulator in the ADP1972ARUZ-R7?
The internal LDO regulator generates a 5 V rail used to bias the control circuitry and can also be used externally as a pull-up voltage.
- Can the ADP1972ARUZ-R7 operate with high voltage FETs?
Yes, it is designed to operate with external high voltage FETs and half bridge drivers.
- What is the maximum duty cycle of the ADP1972ARUZ-R7?
The maximum duty cycle is 98% and is programmable.
- How does the soft start feature work on the ADP1972ARUZ-R7?
The soft start feature is controlled by a capacitor connected from the SS pin to ground, which brings the output up slowly during power-up and reduces inrush current.
- What are some common applications of the ADP1972ARUZ-R7?
Common applications include PWM battery test systems with recycle capability, such as in hybrid vehicles, PCs, and camera batteries.
