Information based on thermal simulations
Table 6-1 Transient Thermal Impedance (RθJA) and Current Capability| PART NUMBER | RθJA [°C/W](1) | Current [A](2) |
|---|
| without PWM(3) | with PWM(4) |
|---|
| 0.1sec | 1sec | DC | 0.1sec | 1sec | DC | 1sec | DC |
|---|
| DRV8163-Q1 | 4.4 | 13.9 | 35.1 | 18.1 | 10.2 | 6.4 | 8.6 | 4.9 |
(1) Based on thermal simulations using 40mm x 40mm x 1.6mm 4-layer PCB – 2oz Cu on top and bottom layers, 1oz Cu on internal planes with 0.3 mm thermal via drill diameter, 0.025mm Cu plating, 1 minimum mm via pitch.
(2) Estimated transient current capability at 85 °C ambient temperature for junction temperature rise to 150°C
(3) Only conduction losses (I2R) are considered
(4) Switching loss roughly estimated by the following equation:
Equation 1. PSW = VVM x ILoad x
fPWM x VVM/SR, where VVM = 48V,
fPWM = 20KHz, SR = 175V/µs