lb11947 Sanyo Semiconductor Corporation, lb11947 Datasheet - Page 4

• Manufacturer Part Number: lb11947
• Description: Pwm Current Control Type Dc Motor Driver + Switching Regulator
• Manufacturer: Sanyo Semiconductor Corporation

* Note 1: Design guarantee
* Note 2: Measurement of minimum noise canceling time
VM = 45 V, VREF = 2.5 V, C = 2200pF, R = 16 kΩ
Enter the PWM “L” pulse width of 1µs and measure the time TNC from PWM rise to the CR pin voltage of 4 V.
* Note 3: Output delay time measurement
VM = 45 V, PH = “H”, CR = 0V
Measure the time TDO1 from PWM = “H”
to the output rise to 40 V. Measure these times for OUTA, OUTAB, OUTB, and OUTBB respectively.
* Note 4: Measurement of through current
Measure the current flowing to pin E during phase switching of “H”
voltage with a detection resistor.
The current exceeding the current value of 1A at the pulse width of 500 ns or more is judged to be NG as the through
current.
PWM
OUT
PHASE
Pin E
PWM
CR
“L” fall to the output fall to 5 V and TDO2 from PWM = “L”
TDO1
1 s
LB11947
500ns
5V
TNC
TDO2
“L” and “L”
40V
4V
1A
“H” after its conversion to the
No. 7318 -4/14
“H” rise