On Semiconductor NCL30081 Evaluation Board NCL30081LEDGEVB NCL30081LEDGEVB Data Sheet
Product codes
NCL30081LEDGEVB
NCL30081
http://onsemi.com
3
Figure 2. Internal Circuit Architecture
ZCD
Zero Crossing Detection
CS
Leading
Edge
Blanking
Winding and
Output diode
Short Circuit
Protection
Max. Peak
Current
Limit
Ipkmax
WOD_SCP
Qdrv
VCC Management
VCC
DRV
VCC
Internal
Thermal
Shutdown
Clamp
Circuit
VIN
Brown−Out
Dimming
STEP_DIM
BO_NOK
CS_reset
STOP
UVLO
OFF
Latch
STOP
WOD_SCP
Ipkmax
BO_NOK
GND
STOP
Qdrv
STEP_DIM
Short Circuit Protection
Aux_SCP
Aux_SCP
VCC_max
offset_OK
offset_OK
Line
Ipkmax
CS Short
Protection
CS_shorted
CS_shorted
Valley Selection
Fault
Constant−Current
Control
Step
Feedforward
Aux. Winding
Management
Protection
VCC Over Voltage
S
R
Q
V
VIN
V
VIN
V
VIN
V
REF
V
REF
V
VLY
V
VIN
V
REF
V
DD