The HM025NG is HeroMicro an N-channel power MOSFET built using advanced high-cell-density trench technology, designed for cost-effective, high-efficiency medium-to-low-power applications. With ultra-low on-resistance (RDS(ON) < 25 mΩ @ VGS=10V), low gate charge, and excellent thermal performance, it is ideal for motor drives, DC-DC converters, battery management systems (BMS), LED drivers, and consumer power supplies.
1. Key Specifications (from HM025NG.pdf)
Drain-Source Voltage (VDS): 40 V
Continuous Drain Current (ID): 25 A (TC=25°C), 16 A (TC=100°C)
Pulsed Drain Current (IDM): 95 A
On-Resistance (RDS(ON)):
Typ. 18 mΩ (Max 25 mΩ) @ VGS=10V, ID=12A
Typ. 25 mΩ (Max 35 mΩ) @ VGS=4.5V, ID=1A
Gate Threshold Voltage (VGS(th)): 1.2–2.5 V (Typ. 1.6 V)
Total Gate Charge (Qg): 3.5–9 nC (@ VGS=4.5V, VDS=20V, ID=5A)
Input Capacitance (Ciss): 500–799 pF (@ VDS=25V, f=1MHz)
Switching Characteristics (VDD=20V, ID=1A, RGEN=25Ω):
td(on): 2.2 ns, tr: 7.6 ns
td(off): 17 ns, tf: 5 ns
Body Diode Forward Voltage (VSD): ≤1 V @ IS=1A
Package: TO-252 (DPAK, surface-mount with thermal pad)
Power Dissipation (PD): 26 W (TC=25°C)
Thermal Resistance (RθJC): 4.8 °C/W
Operating Junction Temperature: –50°C to +150°C
2. Key Usage Guidelines
(1) Logic-Level Drive Compatibility
Operates efficiently at VGS = 4.5 V (typical for 5V logic), with RDS(ON) ≤ 35 mΩ.
For lowest conduction loss, drive with VGS = 10 V.
(2) Thermal Management & PCB Layout
Solder the exposed thermal pad to a copper pour (≥1.5 cm²) with multiple thermal vias.
Derate current above 15 A continuous; ensure TJ ≤ 150°C.
(3) High-Speed Switching & Low EMI
Ultra-low Qg (<9 nC) enables 100–500 kHz operation.
Use RG = 10–30 Ω to damp ringing and reduce EMI.
(4) Body Diode for Freewheeling
Supports 25 A continuous reverse current; VSD ≤ 1 V reduces freewheeling loss.
(5) Safe Operating Area (SOA)
Refer to SOA curve (Fig. 6); avoid prolonged high-VDS/high-ID operation.
Pulsed mode (≤300 μs, ≤2% duty) allows full 95 A IDM.
3. Typical Applications
12V/24V DC-DC converters (synchronous rectifier or main switch)
Low-side motor drivers in power tools
BMS battery charge/discharge switches
LED driver power stages
Home appliance power control (e.g., AC units, washing machines)
4. Summary
The HM025NG offers an excellent balance of 40V rating, 25A current capability, ultra-low RDS(ON), logic-level compatibility, and efficient TO-252 packaging. With proper drive design, thermal layout, and SOA compliance, it delivers high efficiency, reliability, and compactness in cost-sensitive power applications.
