IP5328P

It depends on ports and protocols. The IP5306 class parts are simple single-cell chargers with a 5 V boost and LED display but no fast-charge negotiation. The IP5328 is the predecessor of the IP5328P with the same QFN40 footprint and pinout. The IP5328P adds full bidirectional PD2.0/PD3.0 with PPS, QC2.0/QC3.0, FCP, AFC, SFCP, MTK PE+ and USB-C DRP, four USB ports and up to 18 W output. The IP5330 and IP5356 go further with 3 A charge/discharge, digital-tube (seven-segment) display drive and Type-C 3 A input. For a new PD power bank the IP5328P or IP5356 is the right starting point; for a plain 5 V pack the cheaper IP5306-class part is sufficient.

Not in the standard configuration. During charging the device closes the output ports to protect a connected load from the higher fast-charge input voltage, so pass-through operation is off by default; Injoinic lists simultaneous charge and discharge as a customisable option for volume programmes. If your product must run a load while charging, either request the custom firmware through the distributor, or use a charger with true NVDC power path such as the BQ24295 in front of a separate boost stage.

Charge voltage is set by the RVSET resistor: open (NC) gives 4.20 V for standard lithium-ion, 120 kΩ gives 4.35 V, 68 kΩ gives 4.40 V and 10 kΩ gives 4.50 V for high-voltage cells. Never use a higher setting than your cell's datasheet allows — over-voltage charging a 4.2 V cell is a safety failure, not a capacity gain. LED count is auto-detected: the device supports one, two, three or four battery-level LEDs and identifies how many are fitted, so the same firmware and layout serve different enclosure designs, plus a torch LED on the LIGHT pin at 15 mA.

One 2.2 µH power inductor handles both directions; it must be rated for the peak charge current you plan (5 A class) with low DCR, since the same winding carries buck and boost current. Battery current is sensed by a 10 mΩ resistor between VSYS and the VSP/VSN pins, and those sense traces must be routed separately from the power path and taken Kelvin-style to the pins, or the fuel gauge and over-current protection will read low. Keep the LX pins (five of them) close to the inductor, put the BST capacitor tight to pin 19, and give the exposed pad a via array to a ground plane — thermal resistance is 26 °C/W only when the pad is properly soldered.

On chip: input over-voltage and under-voltage, output over-current, over-voltage and short-circuit, battery over-charge, over-discharge and over-current, die over-temperature, and charge/discharge pack NTC temperature protection, plus 4 kV ESD and 25 V withstand on the input and CC pins. Injoinic still expects an external NTC on the pack and, for a multi-cell or unprotected 18650 pack, a separate cell protection board is good practice because the SoC protects the converter, not the cell's absolute limits during a fault such as an internal short. Certification bodies normally require both, along with a properly rated fuse.

Boost efficiency is 95% typical at 5 V and 2 A from a 3 V cell, 92% at 9 V and 2 A, and 90.8% at 12 V and 1.5 A; charge efficiency reaches 94%. The 18 W ceiling is set by the boost current limit of 3.8 A typical on the output sense and by die temperature, not by the protocol. At 12 V the current capability falls to 1.5 A, so a 12 V PD profile delivers about 18 W while a 5 V profile delivers roughly 15.5 W. Because the battery-side current is boosted, expect around 5 A to 6 A out of the cell at full 12 V load — size the cell, its wiring and the protection FET accordingly.

Functionally, not visually. Read the chip registers over I2C (the 14-bit ADC gives battery voltage and current) to confirm the die is programmed and responsive, then run a protocol analyser through PD, QC3.0, FCP and AFC handshakes and verify the negotiated voltages against the datasheet tolerances — QC2.0 5 V output should measure 4.95 V to 5.23 V at 1 A, 9 V within 8.75 V to 9.25 V, and 12 V within 11.75 V to 12.25 V. Finally load the boost to 18 W for fifteen minutes and check case temperature and that efficiency matches the specified figure. We perform this sequence on samples from every reel and can share the logs.

MOQ is 100 pcs loose for prototyping or one tape-and-reel for production quantities in the 40-pin QFN. Shenzhen stock ships in one to two business days; factory-channel orders through Injoinic run four to eight weeks. Because the part is a SoC with programmable options, custom firmware requests (pass-through charging, PD 15 V output, wearable-friendly low-current detection) carry their own lead time and minimum order, so raise them at quotation stage.