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1. Description
TB6674PG, TB6674FG, and TB6674FAG are stepping motor driver ICs with MOS output transistors. The ICs can control two-phase stepping motor forward and reverse by bipolar driving. They have a power-saving circuit and a standby circuit.
2. Features
1. They are similar substituting products of TA7774PG,TA7774FG, and TA7774FAG. Both products have same packages and same pin assignments.
2. One-chip two-phase bipolar stepping motor driver (including two bridge drivers)
3. Power saving operation is available.
4. Standby operation is available. Current consumption ≤ 20 μA (typ.)
5. Built-in punch-through current restriction circuit for system reliability and noise suppression.
5. TTL-compatible inputs INA, INB, PS, and Vs2B terminals
6. ON resistance PS = L : 2.9 Ω (Typ.) PS = H: 7.9 Ω (Typ.)
7. High driving ability.
<TB6674PG/FG>
: IO (START) 350 mA (MAX.) : VS1 ENABLE
: IO (HOLD) 100 mA (MAX.) : VS2 ENABLE
<TB6674FAG>
: IO (START) 100 mA (MAX.) : VS1 ENABLE
: IO (HOLD) 50 mA (MAX.) : VS2 ENABLE
8. Typical PKG DIP16 pin, HSOP16 pin, SSOP16 pin
9. GND terminal = HEAT SINK
10. Process :BiCD0.6 (30 V)
11. Over current shutdown circuit (ISD).
12. Thermal shutdown circuit (TSD).
13. Undervoltage lockout circuit (UVLO).
14. Pull-down resistance for input terminal (250 kΩ).
3. Pin configuration
4. Block Diagram
5. Package Dimensions
