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Maxim MAX77932BEWO 8A Standalone Dual-Phase Switched-Capacitor Converter

Shenzhen Mingjiada Electronics Co., Ltd. is a well-known distributor of electronic components, specialising in supplying MAX77932BEWO, a high-performance 8A independent biphase switched capacitor converter. This innovative power management IC features an inductor-less design, which is particularly suitable for space-constrained portable device applications, providing an efficient voltage conversion solution for 2S Li-ion battery systems.

Product Overview and Technical Specifications:

MAX77932BEWO is a standalone, dual-phase switched-capacitor converter with integrated power switches that delivers 8A output current and divides the input voltage by two. The MAX77932BEWO is suitable for applications that utilize 2S Li+ batteries while powering circuitry that operates at 1S-equivalent voltage. MAX77932BEWO also suitable for applications migrating from 1S to 2S battery configurations. The MAX77932BEWO simplifies this migration by converting the 2S battery voltage to 1S-equivalent output and allows designers to preserve the existing downstream 1S power architecture.

The inductorless switched-capacitor converter topology of the MAX77932BEWO shrinks the overall footprint and reduces the maximum height of the circuit. Its high switching frequency, up to 1.5MHz, reduces the size and number of capacitors required, further minimizing the solution footprint. The MAX77932BEWO ensures safe operation with integrated overvoltage, undervoltage, overcurrent, and thermal protection, and also minimizes EMI with built-in frequency dithering. In addition to the small solution size, lower EMI, and protection features, the MAX77932BEWO class-leading peak efficiency of 98.5% simplifies thermal design and makes it ideal for consumer, medical, and industrial applications.

MAX77932BEWO features an I2C compatible, 2-wire serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL). The MAX77932BEWO supports SCL clock rates up to 3.4MHz. The converter parameters such as OCP, OVLO or UVLO thresholds, switching frequency, soft-start current, and duration are easily adjustable through the I2C interface. The MAX77932BEWO consumes a low quiescent current of 30μA when operating and 4μA in shutdown. MAX77932BEWO is available in a tiny, lead-free 0.4mm pitch, 2.4mm x 2.8mm 42-pin wafer-level package (WLP).

Core Electrical Parameters:

Output Current Capability: 8A continuous output current to meet high load requirements

Voltage conversion function: Precise division of input voltage by 2, especially suitable for 2S LiPo battery applications (7.4V to 3.7V)

Quiescent Current: Ultra-low supply current of only 30µA, dramatically improving light-load efficiency

Operating temperature range: Wide temperature operation from -40°C to 85°C for a wide range of environmental conditions

Topology: Inductorless switched-capacitor architecture reduces PCB footprint and component height

The MAX77932BEWO chip's innovation is its dual-phase switched-capacitor architecture, which achieves efficient energy conversion through alternating charging and discharging phases, resulting in lower electromagnetic interference (EMI) and simpler layout design than traditional inductive DC-DC converters. Its integrated design reduces the number of external components, enabling thinner and lighter designs for end products.

Feature Of MAX77932BEWO

8A Switched Capacitor Converter

2S to 1S Battery Voltage Conversion (VOUT = VIN/2)

Integrated Power Switches

Low IQ: 30μA Operating, 4μA Shutdown

Soft-Start with Programmable Current and Timeout

Programmable Input Overvoltage Lockout

Programmable Output Overvoltage Lockout

Programmable Overcurrent Protection

Programmable Switching Frequency 0.25MHz to 1.5MHz

Thermal Alarm and Protection

Chip Enable Input

Power Good Indicator Output

Frequency Dithering

I2C Interface with Interrupt

Application Of MAX77932BEWO

Consumer electronics field:

Smartphones and tablets: Provides efficient power conversion for low-voltage core circuits such as processors and memory

Ultrabooks and laptops: Used for auxiliary power rail management, especially for generating intermediate voltage from 2S battery systems.

Digital SLR and Mirrorless Cameras: Power image sensors and processors while saving valuable space

Portable devices:

Mobile power and fast charging devices: Enables efficient voltage conversion and improves overall energy efficiency

Portable printers: Provides a stable power solution in limited spaces

Portable Gaming Devices:  Meets High-Current Demands of High-Performance Processors

Professional & Business Devices:

Mobile point-of-sale (mPOS) devices: Ensures reliable operation of transaction terminals in a variety of environments

Two-way radio communication equipment: Provides stable power for RF power amplifiers

Industrial handheld terminals: Meets the stringent requirements of wide-temperature operating environments