SLUSFH4A March 2025 – July 2025 BQ25858-Q1 , BQ25858B-Q1
PRODUCTION DATA
請參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
BQ25858-Q1, BQ25858B-Q1 are wide voltage, bidirectional switched-mode synchronous buck-boost controllers. The device offers high-efficiency voltage conversion over a wide voltage range with output CC-CV control. The device integrates all the loop compensation and 5V gate drivers for the buck-boost converter, thereby providing a high density solution with ease of use. The switching frequency of the device can be programmed or forced to follow an external clock frequency via the FSW_SYNC pin. While switching under light-load, the device offers an optional Pulse Frequency Modulation (PFM) scheme to increase efficiency. In reverse mode, the device draws power from the output supply and regulates the input terminal voltage with an added constant current loop for protection.
Besides the I2C host-controlled mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. By default, the device is programmed to provide 5V output, and the target output voltage can be adjusted via the VOUT_REG register bits. Forward switching function is controlled via the CE pin.
The input operating window is programmed via the ACUV and ACOV pins. When the input voltage is outside the programmed window, the device automatically stops switching, and the PG pin pulls HIGH.
The BQ25858-Q1, BQ25858B-Q1 provide various safety features including over-voltage and over-current protections on the input and the output. The thermal shutdown prevents operating when the junction temperature exceeds the TSHUT limit.
The device has two status pins (STAT, and PG) to indicate the switcher and input voltage status. These pins can be used to drive LEDs or communicate with a host processor. If needed, these pins can also be used as general purpose indicators and their status controlled directly by the I2C interface. In addition, the CE pin can also be used as a general purpose indicator. The INT pin immediately notifies host when the device status changes, including faults.
The device also provides a 16-bit analog-to-digital converter (ADC) for monitoring input current, output current and input/output/thermistor voltages (IAC, IOUT, VAC, VOUT, TS).
The device comes with a 36-pin 5mm × 6mm QFN package with 0.5mm pin pitch.