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ACT4751 Dataheets PDF



Part Number ACT4751
Manufacturers Qorvo
Logo Qorvo
Description USB Fast Charger
Datasheet ACT4751 DatasheetACT4751 Datasheet (PDF)

ACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current FEATURES • Certified USB Fast Charger, Reference Designs • Qualcomm® Certified, Quick Charger Designs • 4.5 V to 40 V Operational Input Voltage • Programmable Output Voltage by I2C 3 V to 24 V in 12.5 mV Step • Programmable Output Current Limit 4 A in 256 Step Resolution • 450 kHz to 2.25 MHz Fixed-Frequency Current-Mode Control with External Clock Sync, 100% Duty Operation, Stable with MLCC • .

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ACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current FEATURES • Certified USB Fast Charger, Reference Designs • Qualcomm® Certified, Quick Charger Designs • 4.5 V to 40 V Operational Input Voltage • Programmable Output Voltage by I2C 3 V to 24 V in 12.5 mV Step • Programmable Output Current Limit 4 A in 256 Step Resolution • 450 kHz to 2.25 MHz Fixed-Frequency Current-Mode Control with External Clock Sync, 100% Duty Operation, Stable with MLCC • Out of AM Radio / Spread-Spectrum Operation • 50 mΩ Integrated High-Side / Low-Side FETs • 5 V / 350 mA Bias Buck Converter • 20 mA AUX LDO, Programmable Output Voltage • I2C Interface, Fast-mode Plus (Fm+, 1 MHz) with Configurable Address • Protections: UVLO, OVP, UVP (Hiccup/Latch-off), OCP, TSD • Thermally Enhanced 5 mm × 5 mm QFN Package APPLICATIONS • USB Fast Charger (PD 3.0 PPS) • Quick Charge 4, Quick Charge 4+, Quick Charge 3.0 • Industrial Power Supply • Infrastructure Power Supply • High Power LED Lighting GENERIC DESCRIPTION The ACT4751 is a programmable DC-to-DC buck converter with bias supply rails. This synchronous step-down voltage regulator supports a wide input voltage of 4.5 V to 40 V and integrates both the high side and low side MOSFETS. These 50mΩ RDSON transistors enable high efficiency by reducing power losses. The ACT4751 main buck converter can be dynamically programmed to an output voltage between 3 V and 24 V in 12.5 mV steps via the I2C or analog feedback. Also, it can dynamically program output current between 0 A to 4 A in 256 steps via the I2C in a constant-current (CC) operation mode. The main-buck operates in a proprietary current mode control that supports external clock syncing for switching frequencies between 450 kHz and 2.25 MHz. The ACT4751 is a perfect solution for USB Power Delivery 3.0 Programmable Power Supply (PD 3.0 PPS) charging applications. The ACT4751 integrates a 5 V / 350 mA mini-buck converter and a 20 mA AUX LDO to simplify application system designs. These rails can power up USB PD controllers and the 1.5W VCONN line in active USB-C cables. The ACT4751 is available in a 32-pin 5mm x 5mm QFN package with a power optimized footprint and exposed pad for improved thermal performance. ACT4751-101-REF03 (Test ID: 1100) USB Certified Fast Charger (USB PD 3.0 PPS) Reference Design: USB-C 80W × 1 ACT4751 Data Sheet, Rev. E, 16-Jul-2020 Subject to change without notice ACT4751M-101-REF05 (QC20191223118) 4-Port Total 280W: Quick Charge 4 (USB-C 80W × 2) + Quick Charge 3.0 (Type-A 60W × 2) (based on AEC-Q100 version device) 1 www.qorvo.com ACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current Ordering Information Figure 1. Part Numbering Structure   1. Standard product options are identified in this table. Contact factory for custom options, minimum order quantity required. 2. This device is RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means semiconductor products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards. 3. Package Code designator “Q” represents QFN 4. Pin Count designator “I” represents 32 pins 5. See the Factory Programming Options section for more information about CMI. ACT4751 Data Sheet, Rev. E, 16-Jul-2020 Subject to change without notice 2 www.qorvo.com ACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current PART NUMBER ACT4751QI102 Control Scheme Current-mode AEC-Q100 — User Programmable Parameter Default Output Voltage[1] Precise Output Current Limit[2] AUX LDO Voltage[3] 5.0 V 4A 3.3 V DC-bias Compensation — Not all options are released, please contact your local sales representatives or [email protected] for a status and availability. Also, see Factory Programming Options. Similar Devices Following devices are similar to the ACT4751 device. User Programmable Parameter Default PART NUMBER Control Scheme AEC-Q100 Output Voltage[1] Precise Output Current Limit[2] AUX LDO Voltage[3] ACT4752QI101 Current-mode — 5.0 V 4A 3.3V ACT4751MQI101 Current-mode YES, Grade 1 5.0 V 4A 3.3V   Factory Pre-Programmed Fixed Settings PART NUMBER Control Scheme Output Precise Output Voltage[1] Output Current Current Limit [2] AUX LDO Voltage [3] ACT4755QI101 Current-mode 12.0 V 4A — — ACT4756QI101 Current-mode 24.0 V 4A 4 A ±100 mA 3.3V DC-bias Compensation YES YES DC-bias Compensation YES YES Not all options are released, please contact your local sales representatives or [email protected] for a status and availability. Also, see Factory Programming Options. [1]: Upon requests, output voltage options are available from 3.0 V to 24.0 V in 12.5mV steps, where a minimum required quantity applies. [2]: Upon requests, precise output current limit options are available.


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