TS19340CS14

Taiwan Semiconductor

Secondary-Side Constant Current and Constant Voltage

Controller with PWM / Linear Dimming
DESCRIPTION FEATURES
The TS19340CS14 provides an integrated solution ● Secondary-side CC and CV Control
using built in switch mode constant current (CC) and ● High accuracy internal voltage reference
constant voltage (CV) regulation for isolation smart ● Build in PWM & Linear dimming functions
LED lighting applications. The built in PWM and ● LED current cut-off function
linear dimming functions allows the designer to ● Built-in 3.3V reference for dimming Power
● Compliant to RoHS Directive 2011/65/EU and in
replace many external discrete components used for
Accordance to WEEE 2002/96/EC.
dimming schemes. The PWM frequency is
● Halogen-free according to IEC 61249-2-21
configurable from 100Hz-10kHz through selection of
the compensation capacitor. The linear dimming cut APPLICATION
off voltage is configurable using a resistor divider at ● LED lighting
the CCO pin ● Intelligent lighting management

SOP-14 Pin Definition:

1. VD 14. VCC
2. CCH 13. FB
3. CCL 12. VSEN
4. CCO 11. PHO
5. PWM 10. N/C
6. N/C 9. SWO
7. GND 8. COM
Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020

TYPICAL APPLICATION CIRCUIT

PWM Dimming Application Circuit Linear Dimming Application Circuit

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Taiwan Semiconductor

ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified) (Note 1)

PARAMETER SYMBOL LIMIT UNIT
Power Supply Pin VCC 40 V
PHO Voltage to GND VPHO -0.3 to 40 V
SWO Voltage to GND VSWO -0.3 to 40 V
FB Voltage to GND VFB -0.3 to 5.5 V
VSEN Voltage to GND VVSEN -0.3 to 5.5 V
COM Voltage to GND VCOM -0.3 to 5.5 V
CCH Voltage to GND VCCH -0.3 to 5.5 V
CCL Voltage to GND VCCL -0.3 to 5.5 V
CCO Voltage to GND VCCO -0.3 to 5.5 V
PWM Voltage to GND VPWMB -0.3 to 5.5 V
Junction Temperature Range TJ -40 to +150 °C
Storage Temperature Range TSTG -65 to +150 °C
Lead Temperature (Soldering 10 sec) TLEAD 260 °C
Power Dissipation @ TA=25 °C PD 0.833 W
(Note 2)
ESD Rating (Human Body Mode) HBM 2 kV

(Note 3)
THERMAL PERFORMANCE
PARAMETER SYMBOL LIMIT UNIT
Thermal Resistance Junction to Ambient RθJA 120 °C/W

RECOMMENDED OPERATING CONDITION (TA = 25°C unless otherwise specified) (Note 4)

PARAMETER SYMBOL LIMIT UNIT
Power Supply Pin VCC 38 V
PHO Voltage to GND VPHO -0.3 to 38 V
SWO Voltage to GND VSWO -0.3 to 38 V
FB Voltage to GND VFB -0.3 to 5 V
VSEN Voltage to GND VVSEN -0.3 to 5 V
COM Voltage to GND VCOM -0.3 to 5 V
CCH Voltage to GND VCCH -0.3 to 5 V
CCL Voltage to GND VCCL -0.3 to 5 V
CCO Voltage to GND VCCO -0.3 to 5 V
PWM Voltage to GND VPWM -0.3 to 5 V
Operating Junction Temperature Range TJ -40 to +125 °C
Operating Ambient Temperature Range TOPA -40 to +85 °C

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ELECTRICAL SPECIFICATIONS (TA = 25°C unless otherwise specified)

PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT
Supply Voltage
Turn-on Voltage VCC_ON 11.2 12.0 12.8 V
Turn-off Voltage VCC_OFF 7.1 7.6 8.1 V
Quiescent Current IQ VCC=10V -- 22 -- μA
Operation Supply Current ICC VCC=20V -- 400 -- μA
3.3V Voltage reference VDREF IO=5mA 3.2 3.3 3.4 V
VCC Over Voltage Protection VCC_OVP -- 35 -- V
CCH Over Voltage Protection VCCH_OVP -- 4.2 -- V
GM Amplifier
Voltage reference1 CVH 2.4 2.53 2.66 V
Voltage reference2 CVL 1.15 1.21 1.27 V
Voltage reference3 CCV 196 200 204 mV
Driver
Dropout Voltage (PHO) VOLPHO IO = 20mA -- 0.55 -- V
Dropout Voltage (SWO) VOLSWO IO = 20mA -- 0.48 -- V
Note:
1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. Functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
2. Devices are ESD sensitive. Handing precaution recommended.
3. Thermal Resistance is specified with the component mounted on a test board with low effective thermal conductivity in free
air at TA=25°C.
4. The device is not guaranteed to function outside its operating conditions.

ORDERING INFORMATION

PART NO. PACKAGE PACKING

TS19340CS14 RLG SOP-14 2,500pcs / 13”Reel

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FUNCTION BLOCK

VCC Bias BG LDO VD

VSEN
CCV
CCH
(200mV)
CCL
Dim SWO
CCO
PWM
PHO
FB

GND CVV
(2.5/1.2)

COM

PIN DESCRIPTION
PIN NO. NAME FUNCTION
1 VD 3.3V low drop out voltage
2 CCH Constant current high limit voltage
3 CCL Constant current low limit voltage
4 CCO LED current cut-off voltage
5 PWM PWM input pin
6 N/C No connection
7 GND Ground
8 COM PWM pulse filter pin
9 SWO Open drain output of the comparator for LED current cut-off function
10 N/C No connection
11 PHO Open drain output of the two internal operational amplifier for photo coupler
12 VSEN Current sense pin
13 FB Voltage sense pin
14 VCC Power supply pin

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CHARACTERISTICS CURVES

Figure 1. VDREF vs. Junction Temperature Figure 2. CVH vs. Junction Temperature

Figure 3. CCV vs. Junction Temperature Figure 4. CCH=1.6V vs. Junction Temperature

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APPLICATION INFORMATION
Function Description
The TS19340 is a secondary-side CC/CV shunt regulator for LED lighting dimming application. It has a built-in 3.3V
low drop-out voltage (VD pin) for external dimming control. The LED current setting level for PWM and linear
functions can be adjusted by the CCH (maximum), CCL (minimum), and CCO (cut-off) pins. When LED current is
cut-off, the IC will change the CV reference voltage (2.53V 1.21V) and the SWO will be pulled low.

Figure 5: LED Current Ratio vs. PWM Duty Ratio Figure 6: LED Current Ratio vs. Linear Dimming Voltage

Pin Detail

Pin 1: VD
The IC has built-in 3.3V LDO for setting the dimming function and external MCU.

Pin 2 : CCH
The CCH pin is for the constant current high limit function. The pin function is shown in Figure 5 and Figure 6. The
functional working voltage range is from 3.2V to 0V. The pin connects to internal 5V reference voltage or high
voltage level when the function is not used.
The LED high limit current is shown as follows:
VCCH
ILED(High Limit) = (A)
16 × RS

Pin 3: CCL
The CCL pin is for the constant current low limit function. The pin function is shown in Figure 5 and Figure 6. The
functional working voltage range is from 3.2V to 0V. The pin connects to ground when the function is not used.
The LED low limit current is shown as follows:
VCCL
ILED(Low Limit) = ( A)
16 × RS

Pin 4: CCO (PWM / Linear)

The CCO pin is for the LED current cut-off function. The pin function is shown in Figure 5 and Figure 6. The
functional working voltage range is from 3.2V to 0V. The pin pulls to ground when the function is not used.
The LED cut-off current is shown as a formula following:
VCCO
ILED(Cut Off) = ( A)
16 × RS

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APPLICATION INFORMATION (CONTINUE)

Pin Detail

Pin 5: PWM
The pin is for PWM dimming function control. The pin should be connected to internal 5V reference voltage when
using linear dimming function. Recommend operation frequency range from 100Hz to 10kHz.
The LED current vs. PWM duty ratio is shown as a formula following:
0.2
ILED(PWM) = PWM _ Duty _ Ratio × ( A)
RS
Pin 6 : N/C
No connection.

Pin 7: GND
GND is the reference node of internal circuit.

Pin 8: COM
The COM pin is for PWM pulse filter. The PWM duty ratio will be converted to 3.2V (Duty=100%) ~ 0V (Duty=0%).
A suitable capacitor should be connected between the COM and ground.

Pin 9: SWO
The pin is an open drain output of the comparator for LED current cut-off function. The SWO pin will be pulled low
when the LED current is cut-off.

Pin 10: N/C

No connection.

Pin 11: PHO

The PHO pin is for transferring secondary-side voltage/current signal for the primary-side controller. It is an open
drain output of the two internal OP-AMPs for an external photo coupler. A capacitor and a resistor in series should
be connected between PHO and FB for constant voltage control, and a capacitor and a resistor in series should be
connected between PHO and VSEN for constant current control.

Pin 12: VSEN

The VSEN pin is for LED constant current control. The VSEN reference voltage will be adjusted by the
PWM/CCH/CCL setting. The illustration is shown in Figure 5 and Figure 6.
The maximum LED Current is in the formula as follows:
0.2
ILED(max) = (A)
RS
Pin 13: FB
The FB pin is for LED constant voltage control. The FB reference voltage will be 2.53V when the LED current is not
cut-off, and it will be 1.21V when the LED current is cut-off

Pin 14: VCC

Power supply for the controller during normal operation. The controller will start up when VCC reaches 12V (typical)
and will shut-down when VCC voltage is below 7.6V (typical). A decoupling capacitor should be connected between
the VCC and GND pin as close as possible.

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PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters)

SOP-14

SUGGESTED PAD LAYOUT (Unit: Millimeters)

MARKING DIAGRAM

Y = Year Code
M = Month Code for Halogen Free Product
O =Jan P =Feb Q =Mar R =Apr
S =May T =Jun U =Jul V =Aug
W =Sep X =Oct Y =Nov Z =Dec
L = Lot Code (1~9, A~Z)

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Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.

Information contained herein is intended to provide a product description only. No license, express or implied, to
any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of
sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty,
relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright, or other intellectual property right.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify TSC for any damages resulting from such improper use or sale.

9 Version: B1705