Datasheet TC4431, TC4432 (Microchip) - 6
| Manufacturer | Microchip |
| Description | 1.5A High-Speed 30V MOSFET Drivers |
| Pages / Page | 18 / 6 — TC4431/TC4432. 3.0. PIN DESCRIPTIONS. TABLE 3-1:. PIN FUNCTION TABLE. Pin … |
| Revision | 01-11-2008 |
| File Format / Size | PDF / 279 Kb |
| Document Language | English |
TC4431/TC4432. 3.0. PIN DESCRIPTIONS. TABLE 3-1:. PIN FUNCTION TABLE. Pin No. Symbol. Description. 3.1. Supply Input (VDD). 3.4. Ground (GND)
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TC4431/TC4432 3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE Pin No. Symbol Description
1 VDD Supply Input, 4.5V to 30V 2 IN TTL/CMOS Compatible Input 3 LOCK DIS Input Pin, Enable/Disable for UV Lockout 4 GND Ground 5 GND Ground 6 OUT Drive Output, Pull Down 7 OUT Drive Output, Pull Up 8 VDD Supply Input, 4.5V to 30V
3.1 Supply Input (VDD) 3.4 Ground (GND)
The VDD input is the bias supply input for the MOSFET The ground pins are the return path for the bias current driver and is rated for 4.5V to 30V with respect to the and for the high peak currents which discharge the load ground pins. The VDD input should be bypassed to capacitor. Both ground pins should be used to ensure ground with a local ceramic capacitor. The value of this proper operation. The ground pins should be tied into a capacitor should be chosen based on the capacitive ground plane or have short traces to the bias supply load that is being driven. source return.
3.2 Control Input (IN) 3.5 Drive Output (OUT)
The MOSFET driver input is a TTL/CMOS compatible The TC4431/TC4432 devices have individual source input with 250 mV of hysteresis between the high and and sink output pins. This feature can be used to adjust low threshold voltages. If an input signal level of greater the rise and fall time independently by adding separate than 12V is applied to the device, a series current charge and discharge resistors external to the device. limiting resistor is recommended. Pin 7 (source output) can source 3 A peak currents into capacitive loads and pin 6 (sink output) can sink 1.5 A
3.3 Lockout Disable (LOCK DIS)
peak currents from a capacitive load. The lockout pin enables/disables the undervoltage lockout feature of the device. If undervoltage lockout is desired (output is not enabled until the bias voltage reaches 8.4V (typical) on the rising edge and is disabled when the bias voltage reaches 7.7V (typical) on the falling edge), the lockout pin should be left float- ing. If operation below 7V is desired, the lockout pin should be tied to ground. DS21424D-page 6 © 2007 Microchip Technology Inc. Document Outline 1.0 Electrical Characteristics 2.0 Typical Performance Curves FIGURE 2-1: Supply Current vs. Capacitive Load. FIGURE 2-2: Input Current vs. Input Voltage. FIGURE 2-3: Rise/Fall Time vs. VDD. FIGURE 2-4: tD1 and tD2 Delay vs. VDD. 3.0 Pin Descriptions TABLE 3-1: Pin Function Table 3.1 Supply Input (VDD) 3.2 Control Input (IN) 3.3 Lockout Disable (LOCK DIS) 3.4 Ground (GND) 3.5 Drive Output (OUT) 4.0 Applications Information FIGURE 4-1: Switching Time Test Circuit. 5.0 Packaging Information 5.1 Package Marking Information
TC4431/TC4432 3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE Pin No. Symbol Description
1 VDD Supply Input, 4.5V to 30V 2 IN TTL/CMOS Compatible Input 3 LOCK DIS Input Pin, Enable/Disable for UV Lockout 4 GND Ground 5 GND Ground 6 OUT Drive Output, Pull Down 7 OUT Drive Output, Pull Up 8 VDD Supply Input, 4.5V to 30V
3.1 Supply Input (VDD) 3.4 Ground (GND)
The VDD input is the bias supply input for the MOSFET The ground pins are the return path for the bias current driver and is rated for 4.5V to 30V with respect to the and for the high peak currents which discharge the load ground pins. The VDD input should be bypassed to capacitor. Both ground pins should be used to ensure ground with a local ceramic capacitor. The value of this proper operation. The ground pins should be tied into a capacitor should be chosen based on the capacitive ground plane or have short traces to the bias supply load that is being driven. source return.
3.2 Control Input (IN) 3.5 Drive Output (OUT)
The MOSFET driver input is a TTL/CMOS compatible The TC4431/TC4432 devices have individual source input with 250 mV of hysteresis between the high and and sink output pins. This feature can be used to adjust low threshold voltages. If an input signal level of greater the rise and fall time independently by adding separate than 12V is applied to the device, a series current charge and discharge resistors external to the device. limiting resistor is recommended. Pin 7 (source output) can source 3 A peak currents into capacitive loads and pin 6 (sink output) can sink 1.5 A
3.3 Lockout Disable (LOCK DIS)
peak currents from a capacitive load. The lockout pin enables/disables the undervoltage lockout feature of the device. If undervoltage lockout is desired (output is not enabled until the bias voltage reaches 8.4V (typical) on the rising edge and is disabled when the bias voltage reaches 7.7V (typical) on the falling edge), the lockout pin should be left float- ing. If operation below 7V is desired, the lockout pin should be tied to ground. DS21424D-page 6 © 2007 Microchip Technology Inc. Document Outline 1.0 Electrical Characteristics 2.0 Typical Performance Curves FIGURE 2-1: Supply Current vs. Capacitive Load. FIGURE 2-2: Input Current vs. Input Voltage. FIGURE 2-3: Rise/Fall Time vs. VDD. FIGURE 2-4: tD1 and tD2 Delay vs. VDD. 3.0 Pin Descriptions TABLE 3-1: Pin Function Table 3.1 Supply Input (VDD) 3.2 Control Input (IN) 3.3 Lockout Disable (LOCK DIS) 3.4 Ground (GND) 3.5 Drive Output (OUT) 4.0 Applications Information FIGURE 4-1: Switching Time Test Circuit. 5.0 Packaging Information 5.1 Package Marking Information
