The DRV8802 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers, and is intended to drive DC motors. The output driver block for each consists of N-channel power MOSFET’s configured as H-bridges to drive the motor windings. The DRV8802 can supply up to 1.6-A peak or 1.1-A RMS output current (with proper heatsinking at 24 V and 25°C) per H-bridge.
A simple parallel digital control interface is compatible with industry-standard devices. Decay mode is programmable to allow braking or coasting of the motor when disabled.
Internal shutdown functions are provided for over current protection, short circuit protection, under voltage lockout and overtemperature.
The DRV8802 is available in a 28-pin HTSSOP package with PowerPAD™ (Eco-friendly: RoHS & no Sb/Br).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
DRV8802 | HTSSOP (28) | 9.70 mm × 4.40 mm |
Changes from C Revision (August 2013) to D Revision
PIN | I/O(1) | DESCRIPTION | EXTERNAL COMPONENTS OR CONNECTIONS |
|
---|---|---|---|---|
NAME | PIN | |||
POWER AND GROUND | ||||
CP1 | 1 | IO | Charge pump flying capacitor | Connect a 0.01-μF 50-V capacitor between CP1 and CP2. |
CP2 | 2 | IO | Charge pump flying capacitor | |
GND | 14, 28 | — | Device ground | |
VCP | 3 | IO | High-side gate drive voltage | Connect a 0.1-μF 16-V ceramic capacitor and a 1-MΩ resistor to VM. |
VMA | 4 | — | Bridge A power supply | Connect to motor supply (8.2 V to 45 V). Both pins must be connected to the same supply, bypassed with a 0.1-µF capacitor to GND, and connected to appropriate bulk capacitance. |
VMB | 11 | — | Bridge B power supply | |
V3P3OUT | 15 | O | 3.3-V regulator output | Bypass to GND with a 0.47-μF, 6.3-V ceramic capacitor. Can be used to supply VREF. |
CONTROL | ||||
AENBL | 21 | I | Bridge A enable | Logic high to enable bridge A |
AI0 | 24 | I | Bridge A current set | Sets bridge A current: 00 = 100%, 01 = 71%, 10 = 38%, 11 = 0 |
AI1 | 25 | I | ||
APHASE | 20 | I | Bridge A phase (direction) | Logic high sets AOUT1 high, AOUT2 low |
AVREF | 12 | I | Bridge A current set reference input | Reference voltage for winding current set. Can be driven individually with an external DAC for microstepping, or tied to a reference (for example, V3P3OUT). |
BENBL | 22 | I | Bridge B enable | Logic high to enable bridge B |
BI0 | 26 | I | Bridge B current set | Sets bridge B current: 00 = 100%, 01 = 71%, 10 = 38%, 11 = 0 |
BI1 | 27 | I | ||
BPHASE | 23 | I | Bridge B phase (direction) | Logic high sets BOUT1 high, BOUT2 low |
BVREF | 13 | I | Bridge B current set reference input | Reference voltage for winding current set. Can be driven individually with an external DAC for microstepping, or tied to a reference (for example, V3P3OUT). |
DECAY | 19 | I | Decay (brake) mode | Low = brake (slow decay), high = coast (fast decay) |
nRESET | 16 | I | Reset input | Active-low reset input initializes internal logic and disables the H-bridge outputs |
nSLEEP | 17 | I | Sleep mode input | Logic high to enable device, logic low to enter low-power sleep mode |
STATUS | ||||
nFAULT | 18 | OD | Fault | Logic low when in fault condition (overtemp, overcurrent) |
OUTPUT | ||||
AOUT1 | 5 | O | Bridge A output 1 | Connect to motor winding A |
AOUT2 | 7 | O | Bridge A output 2 | |
BOUT1 | 10 | O | Bridge B output 1 | Connect to motor winding B |
BOUT2 | 8 | O | Bridge B output 2 | |
ISENA | 6 | IO | Bridge A ground / Isense | Connect to current sense resistor for bridge A |
ISENB | 9 | IO | Bridge B ground / Isense | Connect to current sense resistor for bridge B |