JAJSDF1A April 2017 – February 2018 UCC20225
PRODUCTION DATA.
PIN | I/O(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
DISABLE | 5 | I | Disables both driver outputs if asserted high, enables if set low or left open. This pin is pulled low internally if left open. It is recommended to tie this pin to ground if not used to achieve better noise immunity. Bypass using a ≈1nF low ESR/ESL capacitor close to DIS pin when connecting to a micro controller with distance. |
DT | 6 | I | Programmable dead time function.
Tying DT to VCCI disables the DT function with dead time ≈ 0ns. Leaving DT open sets the dead time to <15 ns. Placing a resistor (RDT) between DT and GND adjusts dead time according to: DT (in ns) = 10 x RDT (in kΩ). It is recommended to parallel a ceramic capacitor, 2.2nF or above, close to DT pin to achieve better noise immunity. |
GND | 1 | G | Primary-side ground reference. All signals in the primary side are referenced to this ground. |
NC | 3 | – | No internal connection. |
OUTA | 12 | O | Output of driver A. Connect to the gate of the A channel FET or IGBT. Output A is in phase with PWM input with a propagation delay |
OUTB | 9 | O | Output of driver B. Connect to the gate of the B channel FET or IGBT. Output B is always complementary to output A with a programmed dead time. |
PWM | 2 | I | PWM input has a TTL/CMOS compatible input threshold. This pin is pulled low internally if left open. |
VCCI | 4 | P | Primary-side supply voltage. Locally decoupled to GND using a low ESR/ESL capacitor located as close to the device as possible. |
VCCI | 7 | P | Primary-side supply voltage. This pin is internally shorted to pin 4. |
VDDA | 13 | P | Secondary-side power for driver A. Locally decoupled to VSSA using a low ESR/ESL capacitor located as close to the device as possible. |
VDDB | 10 | P | Secondary-side power for driver B. Locally decoupled to VSSB using a low ESR/ESL capacitor located as close to the device as possible. |
VSSA | 11 | G | Ground for secondary-side driver A. Ground reference for secondary side A channel. |
VSSB | 8 | G | Ground for secondary-side driver B. Ground reference for secondary side B channel. |