http://www.hhbytech.com/cn/
Ver1.3
RoHS DIRECTIVE PASS
023-09-0009
091218MA No.1
P r e l i m i n a r y S p e c i f i c a t i o n s
Product Name THB7128-E
1．C
ase Outline：1
9
pins (See attached case outline dimensions.)
2．Function ：PWM current control stepping motor driver
3．Application ：Industrial equipment etc.
4．Features：
・Output on-resistance (High side 0.3 Ω, Low side 0.25 Ω, Total 0.55 Ω; Ta = 25℃, I
O
= 2.5A)
・VMmax=40V(DC)，Iopmax=3.3A
・2, 1-2, W1-2, 2W1-2, 4W1-2, 8W1-2, 16W1-2, 32W1-2 phase excitation are selectable
・With built-in automatic half current maintenance energizing function
・Over current protection circuit
・Thermal shutdown circuit
・Input pull down resistance
・With reset pin and enable pin
5．Absolute Maximum Ratings／Tc=25℃
Parameter Symbol Conditions
Rati
ngs Unit
supply voltage VMmax 40 V
Peak output current Iopmax 3.3 A
Logic input voltage
VINmax 6 V
VREF input voltage
VREFmax 3 V
Operating substrate temperature Tc -30 to +105
℃
Storage temperature Tstg -40 to +125
℃
6．Allowable Operating Ranges／Ta=25℃
Parameter Symbol Conditions
Ratings Unit
Supply voltage range VM 9 to 32 V
Logic input voltage range
VIN 0 to 5 V
VCC input voltage range VCC 0 to 5 V
VREF input voltage range VREF 0 to 3 V
Output current1 Io1
1-2Phase-ex，Tc≦90℃
3.0 A
Output current2 Io2
1-2Phase-ex，Tc=105℃
2.5 A
Output current3 Io3
2Phase-ex，Tc=105℃
1.8 A
