XC8107/08/09
USB Protection
XC8107/08/09 Load Switches for Port Protection
APPLICATION CIRCUIT EXAMPLE
Protection and control of external voltage output
- Overload
- Load circuit failure
- Inrush current countermeasures
- Prevention of reverse current from other USB devices
For USB, supports ON/OFF control and communication of protection status from USB controller
KEY FEATURES:
- For USB & HDMI Ports
- High-precision current limit
- Fixed or Adjustable
- Fixed or Adjustable
- Flag Output Pin
- For overcurrent, reverse current, and overheating detection
- For overcurrent, reverse current, and overheating detection
- Soft-start (0.6ms)
- Ensures smooth start-up
- Ensures smooth start-up
- Industry Standard Footprint
KEY ELECTRICAL PARAMETERS:
| SERIES | |||||||
| Input Voltage | 2.5V ~ 5.5V | ||||||
| Current Limit Value | Fixed | Adjustable | |||||
| Typical Current Limit | See Table Below | ||||||
| Current Limit Response | 2μs (TYP) | ||||||
| ON Resistance | TYP | 85mΩ | |||||
| MAX | 100mΩ | ||||||
| Supply Current | 40μA | ||||||
| Standy-by Current (MAX) | 0.1μA | ||||||
| Flag Delay Time (TYP.) | 4ms, 7.5ms | ||||||
| Protection Circuits | Auto-Recovery or Latch Off | ||||||
| Short-circuit Protection | YES | ||||||
| Reverse Circuit Protection | YES | ||||||
| Thermal Shutdown | YES | ||||||
| Under Voltage Lockout | YES | ||||||
| Soft-start | YES | ||||||
| Flag Output Functions | YES | ||||||
| CE Pin Input Logic | Active High or Active Low | ||||||
| Op. Ambient Temperature | -40°C ~ +105ºC | ||||||
| Packages | SOT-25, USP-6C | USP-6C | |||||
TYPICAL APPLICATION CIRCUIT AND CURRENT LIMIT SPECIFICATION
| IOUT MAX | Current Limit Value | ||||
| MIN. | TYP. | MAX. | |||
| XC8107 | 500mA | 0.81A | 0.90A | 0.99A | |
| 1A | 1.26A | 1.40A | 1.54A | ||
| 1.5A | 1.71A | 1.90A | 2.09A | ||
| 2.A | 2.16A | 2.40A | 2.64A | ||
| XC8108 | 500mA ~ 2A | 0.9A ~ 2.4A | |||
| XC8109 | 50mA ~ 0.9A | 75mA ~ 1.3A | |||
AUTO RESET & LATCH TYPES ARE SELECTABLE
Auto Reset Types (XC810xxC)
When the output voltage drops below 0.7V due to overload or short circuit, our unique function limits the current to ½ to suppress heat generation
Latch-off Types (XC810xxD)
If the over-current last for 7.5ms the latch off type turns off the power transistor
ABNORMAL SYSTEM STATE DETECTION WITH FLAG FUNCTION
Flag Operation when Overcurrent Occurs
When overcurrent state continues for 7.5ms (TYP.), flag pin outputs Low level.
Flag Operation during Reverse Current Protection
When reverse current state continues for 4ms (TYP.), flag pin outputs Low level
The flag function for detection of abnormal system states contributes to the simplification of sequence control circuit design, this is a current limit auto-reset type.
APPLICATION CIRCUIT EXAMPLE
For transferring voltage between boards
- Sub-board ON/OFF control
- Inrush prevention when sub-board is ON
- Disconnection when sub-board fails - Important functions for industrial Applications
Input/Device Current Limit
- Input current limit/inrush prevention
- Placed on the sub-board/device input to comply with the maximum current specification on the main board.
- Prevention of inrush current in actuators, etc.
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