Texas Instruments DRV601EVM2 - DRV601 Evaluation Module DRV601EVM2 DRV601EVM2 Datenbogen
Produktcode
DRV601EVM2
www.ti.com
2.3
Power Supply Setup
3
Shutdown
DVDD
SHUTDOWN
> 50 s
m
> 50 s
m
4
Component Selection
4.1
Charge Pump
Shutdown
To power up the EVM, one power supply is needed. The power supply is connected to the EVM using a
2-pin, 2,54-mm pin header, J10.
2-pin, 2,54-mm pin header, J10.
Table 2. Recommended Supply Voltage
Description
Voltage Limitations
Current Requirement
Cable
Power supply
5 V
0.25 A
CAUTION
Applying voltages above the limitations given in
may cause permanent
damage to your hardware.
For minimum click and pop during power on and power off, the shutdown pin should be kept low. The
preferred power-up/down sequence is shown in
preferred power-up/down sequence is shown in
.
Figure 4. Power-Up/Down Sequence
On the DRV601EVM2, the correct shutdown signal is provided by U95, a TPS3825-33 supply monitor.
The charge pump flying capacitor, C13, serves to transfer charge during the generation of the negative
supply voltage. The PVSS capacitor must be at least equal to the charge pump capacitor in order to allow
maximum charge transfer. Low ESR capacitors are an ideal selection, and a value of 1
supply voltage. The PVSS capacitor must be at least equal to the charge pump capacitor in order to allow
maximum charge transfer. Low ESR capacitors are an ideal selection, and a value of 1
µ
F is typical.
Capacitor values smaller than 1
µ
F can be used, but the maximum output can be reduced. It is therefore
recommended to validate the design with thorough testing.
SLOU217 – March 2008
DRV601EVM2
5