Shenzhen Jingfeihong Technology Co., Ltd.
1st Floor, Factory Building No.6, Hekan Village, BanTian Street, Longgang District, Shenzhen, Guangdong, China
Cao Yangfu
+86 15601649610
65W Bidirectional Fast Charging Power Bank Module – The Perfect Match for Laptops & Smartphones Supports 20V/3.25A bidirectional input and output with a single chip. Self-charges up to 60% in 30 minutes and charges MacBook Air to 50% in 30 minutes. Based on IP2368+SC8701 or Sinowealth SW7201 solution, it integrates full protocols including PD3.0/PPS/QC4+/AFC/FCP/SCP/VOOC and automatically negotiates the optimal PDO. Directly driven by 3–4 series Li-ion batteries (9–17V). Equipped with external 4×30V/5mΩ MOS and one 4.7µH alloy inductor, achieving up to 96% efficiency with full-load temperature rise ≤ 40℃. On-board 2C1A ports: dual USB-C blind plug 65W, port A 30W; simultaneous three-port output 65W + 45W + 18W ≈ 128W. 14-bit ADC monitors voltage, current and temperature in real time. Hardware protections include over-voltage, over-current, short circuit, NTC thermal control (power reduction at 75℃, shutdown at 85℃), with standby power consumption of 5µA. PCB dimensions: only 47.5 × 80 mm, double-layer board with single-sided SMT, compatible with 205080 aluminum case. Pre-tested for CCC/CE, I²C interface open, mass production available in 2 weeks. Ideal cost-effective solution for 20000–30000 mAh high-capacity power banks, car backup power supplies and outdoor office energy stations.
# I. Market Positioning & Typical Models Power range: 65W bidirectional via USB-C (20V/3.25A). Self-charges 60% in 30 minutes; charges MacBook Air to 50% in 30 minutes. Supports 30W PPS for mobile phones and 22.5W SCP for Huawei devices. Capacity range: 20000–30000 mAh (70–111 Wh), airline-friendly, suitable for 1–2 days of outdoor office use. Typical models: Romoss 40000 mAh 5-port (2A1C1L1M), Yisu 30000 mAh 2A1C, Qiaowei 50000 mAh with light, Beibei Power 20000 mAh 2A1C. All certified for PD3.0/PPS. # II. Comparison of Mainstream SOC & Architectures | Chip Model | Power Tube | Efficiency | Battery Cells | Features | Typical Models | |------------------|------------|------------|---------------|----------|----------------| | IP5389 (Injoinic)| External | 95% | 2–5S | Single-chip for protocol, Buck-Boost & fuel gauge; 5-port fast charging | Romoss 65W | | SW7201 (Sinowealth) | External | 96% | 2–4S | I²C voltage/current control; supports 100W pass-through | Beibei Power 65W | | IP5385 (Injoinic)| External | 95% | 2–6S | Dual-chip design; dual USB-C independent 65W | Romoss 27000 mAh 2C2A | Conclusion: IP5389 for simplest peripherals and fastest development; SW7201 for external loop compensation and secondary development; IP5385 for dual USB-C blind-plug 65W in high-end models. # III. Hardware Architecture (IP5389 as Example) ## Synchronous Buck-Boost External 4 × 30V/5mΩ NMOS + 1 × 4.7µH/10mm alloy inductor, switching frequency 500kHz, efficiency up to 95% (20V/3A range). Inductor ripple ≤ 30%, full-load MOS temperature rise 38℃ (with 3mm aluminum heat sink). ## Protocol & Protection On-chip integration of PD3.0, PPS, QC4+, AFC, FCP, SCP, VOOC, Apple 2.4A, BC1.2 DCP, automatically identifies optimal PDO. 12-bit ADC polls VIN, VOUT, IBAT, VBAT; NTC thermal loop: power reduction at 75℃, hardware shutdown at 85℃. ## Battery Management Supports 2–5S Li-ion / LiFePO4 batteries; charge voltage programmable at 4.2/4.35/3.6V; built-in 50mA balancing, ±10mV accuracy. Charging current adjustable 0.3–5A, discharge current up to 20A (limited by MOS and inductor Isat). ## Interface Configuration 2A1C classic layout: USB-C 65W bidirectional, A1 18W, A2 22.5W SCP; simultaneous three-port output 45W + 18W + 18W ≈ 81W. 188 digital tube / LED power indicator; one-key toggle for capacity, I/O power, and temperature display. # IV. Key Performance Test Data (Romoss 65W) | Item | Specification | Remarks | |-----------------------|------------------------|---------| | Input Range | 5–20V | Works with 30–65W PD adapters | | Output Range | 3.3–20V | PPS 3.3–11V/5A, fixed PDO 5/9/12/15/20V/3.25A | | Peak Efficiency | 95% | 15V→20V range, 45–65W load | | Standby Power | 3µA | Ship-mode, wake up by 2s long press | | Temperature Protection| 85℃ | Adjustable via software | | Inductor Peak Current | 25A | 4.7µH recommended, Isat ≥ 30A | | PCB Dimensions | 38mm × 68mm × 1.2mm | Double-layer, single-sided SMT | # V. Design & Mass Production Guidelines - **Inductor Selection**: 4.7µH, DCR ≤ 4mΩ, Isat ≥ 30A, 10mm×10mm shielded alloy to reduce EMI. - **MOS Selection**: 30V/5mΩ level, Ciss ≤ 800pC, DFN3×3 or 5×6 package; parallel dual MOS for heat distribution. - **PCB Layout**: Power loop ≤ 4mm, Kelvin differential sensing; exposed copper + tin + glue at SW node to reduce spikes. - **Thermal Design**: At 65W full load, MOS+inductor power ≈ 3W. 3mm aluminum heat sink or 0.2mm graphite sheet + thermal pad recommended; metal case reduces temperature by 5℃. - **Certification**: PD3.0 requires 20V short-circuit, overshoot, and loop stability tests; 0.15mm safety clearance, 1oz copper for VBUS. - **Customization**: IP5389 supports I²C for voltage/current/LED control; SW7201 supports FB/I²C dual-mode regulation for multi-port blind-plug designs.