High Efficiency LED T9 Tube HT7L4091 Characteristics

High Efficiency LED T9 Tube
HT7L4091
Characteristics
High
Efficiency
 AC 85V ~ 260V input
 High efficiency as IC is powered by Low start-up current + auxiliary winding
 Flicker-Free
 Optional Valley-Fill PFC circuit for enhanced power factor
 16S10P 10W LED
 Simple current-mode buck structure
 IC over temperature protection
 Shut down function for serious LED short circuits -- all LEDs are shorted
 Adaptive voltage for partial LED short circuit -- partial LEDs are shorted
 Inherent LED open circuit protection
Operating Procedure
 Insert the plug into an AC power socket
Application Circuit
FUSE
Ca1
NTC
R11
L1
Ca2
MOV
AC
Lc
C1
R21
Cf
D1
Co
Dsw
D2 Rpf
Lc
Optional
EMC
Circuit
D3
C2
Zin
Tr
Cin
Optional
Da
Valley-Fill PFC
C6
Optional
Protection Circuit
Essential components
Used optional components
Unused optional components
C7
Basic Buck
Circuit
Vin
VDD
GDR
LD
CS
PDM
RT GND
RT
RTs
Rsb
Cc
Ra
Dg
Rg
MOSFET
Rc
Optional Filter
for Noisy CS
Signal
Rs
Rss
Application Options
The design can be adjusted for different application requirements.
 Enhanced power factor with low cost -- uses Valley-Fill PFC circuit
 Excellent power factor -- uses active PFC
 Intelligent lamps

Combine with Holtek’s solutions
PIR controller
TinyPowerTM MCU
Remote controller
 Power above components using the 5V LDO of the HT7L4091

Linear regulator using BJT + diode may be used
 Cost down

Remove optional circuits
LED