国产综合亚洲免费,国产成人tv视频在线观看,亚洲精品SUV精品一区二区

SNVSB83B June 2019 – January 2020 LP8867-Q1 , LP8869-Q1

PRODUCTION DATA.

封裝選項

機械數(shù)據(jù) (封裝 | 引腳)

PWP|20
- MHTS001H

散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)

PWP|20
- PPTD122Q

訂購信息

8.3.6.5 Overview of the Fault and Protection Schemes

A summary of the LP886x-Q1 fault detection behavior is shown in Table 3. Detected faults (excluding LED open or short) cause device to enter FAULT RECOVERY state. In FAULT_RECOVERY the DC-DC and LED current sinks of the device are disabled, and the FAULT pin is pulled low. The device will exit FAULT RECOVERY mode after 100 ms and try the start-up sequence again. When recovery is successful and device enters into NORMAL state, the FAULT pin is released high.

Table 3. Fault Detections

FAULT/ PROTECTION	FAULT NAME	CONDITION	FAULT PIN	Enter FAULT_ RECOVERY STATE	ACTIVE STATE	ACTION
VIN overvoltage protection	VIN_OVP	VIN > 43 V	Yes	Yes	SOFT START, BOOST START, NORMAL	Device enters into FAULT RECOVERY state, and restarts after 100 ms
VIN undervoltage protection	VIN_UVLO	Effective when VIN < 3.85 V Released when VIN >4 V	Yes	Yes	SOFT START, BOOST START, NORMAL	Device enters into FAULT RECOVERY state, and restarts after 100 ms
VIN overcurrent protection	VIN_OCP	VIN-VSENSE_N > 160mV	Yes	Yes	SOFT START, BOOST START, NORMAL	Device enters into FAULT RECOVERY state, and restarts after 100 ms
Open LED fault	LED _OPEN	Adaptive Voltage is max. and any OUTx voltage < 0.9 V	Yes	No	NORMAL	Open string is removed from the DC-DC voltage control loop and output is disabled. Fault pin low could be released by toggling VDDIO/EN pin, If VDDIO/EN is low for a period of 2 µs to 20 µs, LEDs are turned off for this period but device stays in NORMAL.
Shorted LED fault	LED_SHORT	One of OUTx voltage is [0.9 V, 1.9 V] and any OUTx voltage > 6 V	Yes	No	NORMAL	Short string is removed from the DC-DC voltage control loop and output is disabled. Fault pin low could be released by toggling VDDIO/EN pin, If VDDIO/EN is low for a period of 2 µs to 20 µs, LEDs are turned off for this period but device stays NORMAL.
Boost overvoltage protection	BST_OVP	V_FB > 2.3 V	Yes	Yes	NORMAL	Fault is detected if boost overvoltage condition duration is more than 560 ms Device enters into FAULT RECOVERY state, and restarts after 100 ms
SW overvoltage protection	SW_OVP	V_SW > 49 V	Yes	Yes	SOFT START, BOOST START, NORMAL	Device enters into FAULT RECOVERY state, and restarts after 100 ms
Thermal protection	TSD	Effective when Tj > 165 ºC Released when Tj < 145 ºC	Yes	Yes	SOFT START, BOOST START, NORMAL	Device enters into FAULT RECOVERY state, and restarts until TSD fault is released