TS TS19705CX6 Schematic [ru]
TS19705
Single-Stage PFC
Primary-Side-Regulation LED Driver
1/7 Version: A14
SOT-26
Description
TS19705 is a primary-side-regulation with Fly-back control IC with active power factor correction function for LED
lighting applications. The IC achieves high power factor and low Total Harmonic Distortion (THD) operation by
Boundary Conduction Mode (BCM). The line and load regulation of LED current is about <±3% because of
particular control method.
TS19705 also provides gate driving voltage clamping, VCC overvoltage protection and system output open/short
circuit protection to increase IC performance.
Features
● Accuracy Constant Current <±3%
● Low BOM Cost
● Primary-side feedback control
● Application Voltage Range: 90~ 264VAC
● Transition-mode PFC operating
● Built-in Active Power Factor Correction
● Constant Output Current Control
● Good Line and Load Regulation
● Open-LED Protection on DMG pin
● Over-Voltage Protection on VCC pin
● Short-LED Protection
● Cycle by Cycle Over Current Protection on CS pin
● Over-Temperature Protection
● Gate Driving Voltage Clamping
Applications
● E27, T5, T8 LED lighting
● Bulb
● Down Light
● LED Lighting Applications
Ordering Information
Part No.
Package
Packing
TS19705CX6 RFG
SOT-26
3kpcs / 7” Reel
Note: “G” denote for Halogen Free Product
Absolute Maximum Ratings (T
A
= 25oC unless otherwise noted)
Parameter
Symbol
Range
Unit
Power supply pin
VCC
40
V
DMG voltage to GND
V
DMG
-0.3 to 40
V
OUT voltage to GND
V
OUT
-0.3 to 40
V
CS voltage to GND
VCS
-0.3 to 5.5
V
COM voltage to GND
V
COM
-0.3 to 5
V
Junction Temperature Range
TJ
-40 to +150
°C
Storage Temperature Range
T
STG
-65 to +150
°C
Power Dissipation @TA=25 °C
PD
0.3
W
Thermal Resistance Junction to Ambient (Note 2)
RθJA
220
°C/W
Thermal Resistance Junction to Case
RθJC
106.6
°C/W
ESD Rating (Human Body Model)
ESD
2
kV
Pin Definition:
1. Compensation
2. Ground
3. Current Sense
4. Output
5. VCC
6. DMG
TS19705
Single-Stage PFC
Primary-Side-Regulation LED Driver
2/7 Version: A14
Recommended Operating Conditions
Parameter
Symbol
Conditions
Unit
Power supply pin
VCC
38
V
DMG voltage to GND
V
DMG
-0.3 to 38
V
OUT voltage to GND
V
OUT
-0.3 to 38
V
CS voltage to GND
VCS
-0.3 to 5
V
COM voltage to GND
V
COM
-0.3 to VCC
V
Operating Junction Temperature Range
TJ
-40 to +125
°C
Operating Ambient Temperature Range
T
OPA
-40 to +85
°C
Electrical Characteristics (V
CC
=15 , TA=25℃, unless otherwise specified)
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Turn-on voltage
V
CC_ON
17
18
19
V
Turn-off voltage
V
CC_OFF
8.5
9.5
10
V
Quiescent current 1
IQ1
VCC=17V, @ VCC off
--
30
50
µA
Quiescent current 2
IQ2
Start-up @ 4.5kHz
--
600
800
µA
Operation supply current
ICC
--
2.5
3..0
mA
Protection
VCC voltage protection
V
OVPA
31
32
34
V
Output voltage protection
V
OVPS
10
10.5
11
V
CS limit voltage
V
OCP
1.15
1.25
1.35
V
Short circuit protection
V
SCP
Guaranteed by design
-- 3 -- V Oscillator
Start-up timer
t
STR
--
220
--
µs
GM Amplifier
Transconductance
gm
--
60
--
µA/V
Source current
I
COMP_SOU
--
20
--
µA
Driver
Dropout voltage
VOH
VCC=33V, IO = 10mA
--
1.2
1.5
V
VOL
VCC=33V, IO = -10mA
--
0.12
-- V Rising time
tr
VCC=20V, CO =1nF
--
40
--
ns
Falling time
tf
VCC=20V, CO =1nF
--
80
--
ns
Output clamp voltage
V
O_CLAMP
--
--
19
V
Leading edge blanking time
LEBt
--
0.5
--
ns
Note:
1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
2. Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test board
in free air at TA=25°C.
TS19705
Single-Stage PFC
Primary-Side-Regulation LED Driver
3/7 Version: A14
Function Block
Pin Description
Pin No.
Name
Function
1
COM
Output pin of error amplifier.
2
GND
Ground return for all internal circuitry.
3
CS
Input current sense pin.
4
OUT
Power MOS output pin.
5
VCC
Power supply pin for all internal circuitry.
6
DMG
Zero current demagnetization sensing.
Typical Application Circuit
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