LED driver. HT7L5600 Datasheet

HT7L5600 driver. Datasheet pdf. Equivalent

HT7L5600 Datasheet
Recommendation HT7L5600 Datasheet
Part HT7L5600
Description Primary side regulation off line LED driver
Feature HT7L5600; HT7L5600 Primary side regulation off line LED driver with active PFC Features • Small outline SOT2.
Manufacture Holtek Semiconductor
Datasheet
Download HT7L5600 Datasheet




Holtek Semiconductor HT7L5600
HT7L5600
Primary Side Regulation Off Line
LED Driver with Active PFC
Features
• Small outline 6-pin SOT23 package
• Primary-side current sensing and regulation with-
out an opto-coupler
• Wide AC input range – from 85VAC to 265VAC
• High Power Factor of >0.9 without additional
circuitry
• Accurate constant current (< ±3%)
• Low start-up current which reduces power dissipation
• Full protection functions for enhanced safety:
Gate driver output voltage clamp
VCC over voltage protection – VCC OVP
VCC under-voltage lockout with hysteresis –
VCC UVLO
Output LED string over current protection
Output LED string short / open protection
On-chip over temperature protection – OTP
Applications
• General illumination
• E26/27, T5/T8 LED Lamp
• Other LED Lighting Applications
General Description
The HT7L5600 is a single-stage, isolated, primary-
side offline LED lighting controller that achieves a
high power factor. Power control is implemented by
controlling an external MOSFET and accurate LED
constant current regulation from the primary-side
information. This can significantly simplify the LED
lighting system design by eliminating the secondary-
side feedback components and the normally required
opto-coupler. The extremely low start-up current and
quiescent current reduces the total power consump-
tion to provide a high efficiency solution for lighting
applications.
The HT7L5600 provides several protection functions,
which include VCC Under Voltage Lockout (UVLO),
Over Current Protection (OCP), Output LED String
Open Protection, Output LED String Short Protection,
VCC Over Voltage Protection (OVP) and Leading-
Edge Blanking (LEB) for current sensing. Additionally
and to ensure system reliability, the device includes a
fully integrated thermal protection function. To protect
the external power MOSFET from being damaged
by an over voltage, the device DRV pin voltage is
clamped to about 16V.
The high level of functional integration minimises the
external component count giving major advantages
in terms of cost and circuit board area. The device is
supplied in a 6-pin SOT23 package.
Application Circuits
ACIN
VOUT+
VOUT-
COMP ZCD
GND
VCC
CS DRV
HT7L5600
Rev. 1.30
1 September 26, 2018



Holtek Semiconductor HT7L5600
Block Diagram
VCC
ZCD
UVLO
VCC OVP
ZCD OVP
Reference
& Bias
Min
Off Time
ZCD
Comparator
OTP
OCP
CS
S&H
0.3V
EA
Starter
PWM
Generator
COMP
Pin Assignment
SOT23-6
6 54
L5600
Top View
1 23
HT7L5600
DRV
Driver
Logic
Control
LEB
GND
Rev. 1.30
2 September 26, 2018



Holtek Semiconductor HT7L5600
HT7L5600
Pin Description
Pin No.
Symbol
1 COMP
2 GND
3 CS
4 DRV
5 VCC
6 ZCD
Description
Loop compensation pin. A capacitor should be placed between COMP and GND.
Ground pin
Current sense pin. A resistor is connected to sense the MOSFET current.
Gate drive output for driving external power MOSFETs
Power supply pin
Connected to a resistor divider from the auxiliary winding to sense the output voltage.
Absolute Maximum Ratings
Parameter
VCC supply voltage
Input voltage to CS pin
Output voltage at COMP pin
Maximum current at ZCD pin
Maximum operating junction temperature
Storage temperature range
Range
-0.3V~27V
-0.3V~6V
-0.3V~6V
3mA (source), 3mA (sink)
150°C
-55°C~150°C
Recommended Operating Ranges
Parameter
VCC Supply voltage
Operating junction temperature
Range
10V~20V
-40°C~125°C
Rev. 1.30
3 September 26, 2018







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