Motor driver for cordless power tools using low loss element TPH1R204PB within small package. The motor speed is controlled by MCU. Description of circuit design method.
Motor driver for cordless power tools using low loss element TPH1R204PB within small package. The motor speed is controlled by MCU. Description of circuit design method.
“Design・Document” contains the documents listed below.
“Design・File” contains the contents listed below.
Part Number | Device Category | Portion Usage | Description |
---|---|---|---|
Schottky barrier diode |
Power section・2 |
VF=0.40 V (typ.) @IF=500 mA |
|
Switching diode |
Input voltage detector・1 |
VF=0.715 V (max) @IF=1 mA, IR=30 nA (max) @VR=25 V |
|
PNP Power transistor |
Standby power reduction circuit・1 |
VCEO=-50 V, IC=2 A (DC) , IB=-200 mA |
|
NPN Power transistor |
Standby power reduction circuit・1 |
VCEO=120 V, IC=1 A (DC) , IB=100 mA |
|
Transistor for LF amplification |
Standby power reduction circuit・1 |
VCEO=50 V, IC=200 mA (DC) , IB=30 mA |
|
N-ch Power MOSFET |
Output section・6 |
QSW=21 nC (typ.) , QOSS=56 nC (typ.) , RDS(ON)=0.85 mΩ (typ.) |
|
Comparator |
Motor current detector・2 |
VDD, VSS=7 V , CMVIN=4.1 V (max) |
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