SCYW99143 Datasheet, PDF (3/35 Pages) ON Semiconductor – Universal High Voltage Control Block

SCYW99143
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
Table 1. PAD CONNECTIONS
Pad No. Pad Name
Function
1
X2
X2 discharge sense input
2
REM
Remote input
3
Disable
Open collector
4
VCC_stop
VCC start input for
communication between two ICs
5
BO_buff
Brown out divider output
6
GND
−
7
Latch
Latch input for communication
between two ICs or outside latch
condition
8
V_cc
Supplies the controller
10
HV
HV startup input
Pad Description
Detects AC line presence and activates X2 discharge circuitry with
certain delay when the application is unplugged from the mains.
Initiates ultra low consumption mode (off−mode) when cross
V_REM_off.
Open collector to grounding FB pin to disable the second controller
Voltage input to detect that second controller reaches VCC_(on)
threshold
Output signal of integrated Brown out sensing network
The HV controller ground.
The SCYW99143 can be latched−off via this input when used as a
standalone IC or for Latch signal from second controller (inter−
bonding connection) to detect transition to latch−off mode..
This pin is connected to an external auxiliary voltage and supplies
the controller.
Connects internal HV startup current source to rectified AC input
line. Allows for lossless Brown Out detection. Discharges X2 capa-
citor(s) when application is unplugged from the mains.
Figure 3. Internal Circuit Architecture (Active ON)
http://onsemi.com
3