ZHCS276F September 2011 – February 2025 DRV8818
PRODUCTION DATA
| PIN | TYPE(1) | DESCRIPTION | ||
|---|---|---|---|---|
| NAME | NO. | |||
| POWER AND GROUND | ||||
| CP1 | 23 | IO | Charge pump flying capacitor | Connect a 0.22μF capacitor between CP1 and CP2. |
| CP2 | 24 | IO | Charge pump flying capacitor | Connect a 0.22μF capacitor between CP1 and CP2. |
| GND | 7, 21 | — | Device ground | |
| VCC | 10 | — | Logic supply voltage | Connect to 3V to 5V logic supply. Bypass to GND with a 0.1μF ceramic capacitor. |
| VCP | 22 | IO | High-side gate drive voltage | Connect a 0.22μF ceramic capacitor to VM. |
| VGD | 20 | IO | Low-side gate drive voltage | Bypass to GND with a 0.22μF ceramic capacitor. |
| VMA | 28 | — | Bridge A power supply | Connect to motor supply (8V to 35V). Both VMA and VMB must be connected to same supply. |
| VMB | 15 | — | Bridge B power supply | |
| CONTROL | ||||
| DECAY | 5 | I | Decay mode select | Voltage applied sets decay mode - see motor driver description for details. Bypass to GND with a 0.1μF ceramic capacitor. Weak internal pulldown. |
| DIR | 3 | I | Direction input | Level sets the direction of stepping. Weak internal pulldown. |
| ENABLEn | 26 | I | Enable input | Logic high to disable device outputs, logic low to enable outputs. Weak internal pullup to VCC. |
| ISENA | 1 | — | Bridge A ground / Isense | Connect to current sense resistor for bridge A |
| ISENB | 14 | — | Bridge B ground / Isense | Connect to current sense resistor for bridge B |
| RCA | 6 | I | Bridge A blanking and off time adjust | Connect a parallel resistor and capacitor to GND - see motor driver description for details. |
| RCB | 9 | I | Bridge B blanking and off time adjust | Connect a parallel resistor and capacitor to GND - see motor driver description for details. |
| RESETn | 17 | I | Reset input | Active-low reset input initializes the indexer logic and disables the H-bridge outputs. Weak internal pullup to VCC. |
| SLEEPn | 27 | I | Sleep mode input | Logic high to enable device, logic low to enter low-power sleep mode. Weak internal pulldown. |
| SRn | 16 | I | Sync. Rect. enable input | Active-low. When low, synchronous rectification is enabled. Weak internal pulldown. |
| STEP | 19 | I | Step input | Rising edge causes the indexer to move one step. Weak internal pulldown. |
| USM0 | 13 | I | Microstep mode 0 | USM0 and USM1 set the step mode - full step, half step, quarter step, or eight microsteps/step. Weak internal pulldown. |
| USM1 | 12 | I | Microstep mode 1 | USM0 and USM1 set the step mode - full step, half step, quarter step, or eight microsteps/step. Weak internal pulldown. |
| VREF | 8 | I | Current set reference input | Reference voltage for winding current set |
| OUTPUTS | ||||
| AOUT1 | 4 | O | Bridge A output 1 | Connect to bipolar stepper motor winding |
| AOUT2 | 25 | O | Bridge A output 2 | Positive current is AOUT1 → AOUT2 |
| BOUT1 | 11 | O | Bridge B output 1 | Connect to bipolar stepper motor winding |
| BOUT2 | 18 | O | Bridge B output 2 | Positive current is BOUT1 → BOUT2 |
| HOMEn | 2 | O | Home position | Logic low when at home state of step table, logic high at other states |