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参数资料
| 型号： | TB7004FL |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC56 |
| 封装： | 8 X 8 MM, PLASTIC, QFN-56 |
| 文件页数： | 3/16页 |
| 文件大小： | 264K |
| 代理商： | TB7004FL |
TB7004FL
2008-05-23
11
Operational Description
Power Supplies
VGIN: Power supply for low-side MOSFET gate drive
The low-side gate drive voltage can be selected, independent of VCIN.
Supply voltage: 5 to 16 V
VCIN: Power supply for the internal control circuitry
Incorporates undervoltage lockout (UVLO.)
UVLO threshold voltage: 7.2 V (typ.)
UVLO hysteresis voltage: 2.0 V (typ.)
In UVLO mode, the TB7004FL turns off both the high-side and low-side MOSFETs and shuts down
the internal 5-V regulator.
DISBL#
The DISBL# input enables and disables the MOSFET drivers.
H: Normal operation
L: Turns off both the high-side and low-side MOSFETs.
Rising threshold voltage: 3.5 V (typ.)
Falling threshold voltage: 1.5 V (typ.)
While the MOSFET drivers are disabled, the 5-V regulator remains active.
PWM
Control input for the internal power MOSFET drivers
H: Turns on the high-side MOSFET and turns off the low-side MOSFET.
L: Turns off the high-side MOSFET and turns on the low-side MOSFET.
Rising threshold voltage: 3.5 V (typ.)
Falling threshold voltage: 1.5 V (typ.)
If the PWM input stays between the rising and falling threshold voltages for the 200-ns hold-off time, the
TB7004FL turns off both the high-side and low-side MOSFETs. Thereafter, setting the PWM input High
causes the TB7004FL to resume normal operation.
UVLO
Normal
operation
7.2
9.2
VCIN (V)
Disabled
Enabled
1.5
3.5
VDISBL# (V)
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