The HM008NG is HeroMicro an N-channel power MOSFET built using advanced high-cell-density trench technology, optimized for high-efficiency, high-current switching applications. With ultra-low on-resistance (RDS(ON) < 8.5 mΩ @ VGS=10V), low gate charge, and excellent thermal performance, it is ideal for motor drives, DC-DC converters, power management, power tools, and industrial controls.
1. Key Specifications (from HM008NG.pdf)
Drain-Source Voltage (VDS): 70 V
Continuous Drain Current (ID): 70 A (TC=25°C), 52 A (TC=100°C)
Pulsed Drain Current (IDM): 320 A
On-Resistance (RDS(ON)):
Typ. 7.5 mΩ (Max 8.5 mΩ) @ VGS=10V, ID=30A
Gate Threshold Voltage (VGS(th)): 2–4 V (Typ. 3 V @ ID=250 μA)
Total Gate Charge (Qg): 35 nC (@ VGS=10V, VDS=30V, ID=30A)
Input Capacitance (Ciss): 3900 pF (@ VDS=30V, f=1MHz)
Switching Characteristics (VDS=30V, ID=30A, RG=3Ω):
td(on): 15 ns, tr: 90 ns
td(off): 45 ns, tf: 30 ns
Body Diode:
VSD ≤ 1.2 V @ IS=30A
trr: 78 ns, Qrr: 51 nC
Single-Pulse Avalanche Energy (EAS): 110 mJ
Package: TO-220 (through-hole, metal tab = drain)
Power Dissipation (PD): 103 W
Thermal Resistance (RθJC): 1.46 °C/W
Junction Temperature Range: –55°C to +175°C
Environmental: Green (lead-free) option available
2. Key Usage Guidelines
(1) Gate Drive & High-Frequency Operation
Drive with VGS = 10 V for minimum RDS(ON).
Excellent FOM (RDS(ON) × Qg) enables efficient operation up to 300 kHz.
Tested with RG = 3 Ω—adjust between 2–10 Ω based on EMI requirements.
(2) Thermal Management
Ultra-low RθJC (1.46 °C/W) supports 103 W dissipation—mount the metal tab to a heatsink with thermal paste.
Monitor case temperature under continuous high-current loads to ensure TJ ≤ 175°C.
(3) Body Diode for Synchronous Rectification
Low VSD (1.2 V) and fast trr (78 ns) make it suitable for synchronous rectifiers or freewheeling paths.
Reduces dead-time loss in half-bridge/H-bridge topologies.
(4) Avalanche Capability
Rated for 110 mJ single-pulse avalanche energy—suitable for small inductive loads.
Add TVS or snubber for enhanced robustness in harsh environments.
(5) Safe Operating Area (SOA)
Wide DC and pulsed SOA (Fig. 9) supports linear-mode operation.
Use 320 A IDM only under short pulses (≤300 μs, ≤0.5% duty).
3. Typical Applications
12V/24V/48V high-current DC-DC converters (Buck main switch or sync rectifier)
Power tool motor drives (H-bridge low-side)
BMS battery charge/discharge switches
Industrial load switches
Server VRM synchronous rectification
4. Summary
The HM008NG delivers exceptional performance with its 70V rating, 70A current capability, and <8.5 mΩ RDS(ON). Leveraging advanced trench technology, it enables highly efficient, compact power designs. With proper drive, thermal, and layout practices, it is a reliable choice for demanding high-current applications.
