TCIL6568 CDIL | Alldatasheet
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Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company MOS IC TCIL6568 Non - isolated APFC BUCK LED Controller The Document is Applied to：TTCIL6568-7 & TTCIL6568-14 TCIL6568_REV2_22102016E Datasheet Page 1 of 10 1. General Description The TCIL6568 is a non -isolated BUCK topology constant current control LED controller with Active Power Factor Correction (APFC). For 85Vac-265Vac input voltage , i t can achieve high precision LED output current, high power factor, low THD and high system efficiency . The TCIL6568 work s in boundary conduction mode to reduce the MOSFET switching losses. The TCIL6568 integrate 600V MOSFET internally, which simplifies external circuit. The system full wave detec tion mode makes the high precis ion of constant current controlling, also the Line V oltage Regulation and Load Regulation . The multi- protection feature of TCIL6568 significantly improves the system reliability and safety. The TCIL6568 features VCC under voltage lock out, LED open/ short -circuit protection, CS resistor open -circuit protection , cycle- by-cycle current limit, and intelligent thermal adjust . TCIL6568- 7 is for 3 to 7 watt driver appli cations and TCIL6568 -14 is for 9 -14 watt driver applications. Features ：
- Inductance Current of B oundary- Continu ous Mode
- Integrate Active Power Factor Correction, High PF, Low THD
- High Precision of LED output current: ±3%
- Superior Line V oltage Regulation and Load Regulation
- Low Start Up Current
- Extremely Low Quiesc ent Current
- High Precision LED Output current for 100Vac-300Vac Input Voltage
- Output Open/Short Circuit Protection
- CS Resistor Open -circuit protection
- VCC UVLO
- Integrate 600V power MOSFET
- Package: SOP7
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 2 of 10 2. Function Diagram and Pin Descr iption 2. 1、Function Diagram VCC Clamp Power Supply &VREF Zero Current Detection OVP Current Limit Logic Control Drive CAP CS OUTVCC ZCD UVLO VREF Vcs OTAPWM/ PFC GND 2. 2、Function Description The TCIL6568 is a high -PF non -isolated BUCK topology LED controller with Active Power Factor Correction (APFC) internally. The TCIL6568 work s in boundary conduction mode and employs unique control mode to achieve high precision LED output current. Also it achieve d superior Line V oltage Regulation and Load Regulation 2.2.1 、Start up and UVLO Initially, the capacitor beside VCC pin is charged through the start up resistor from the AC line. After the VCC voltage climbs up to VCC turn voltage threshold VCC_ON , the control logic start to work. After the output voltage established, the output voltage supply power for VCC through diode to reduce system power dissipation. When VCC fa lls below VCC turn off voltage threshold VCC_OFF , the system shut down, and the system enters another start up cycle. 2.2.2 、Power -on Soft- start The TCIL6568 supply soft -start function . T he IC works in 10 kHz switch frequency after power on , and the CAP pin voltage is pulled up to 1.5V . After the output pulse establish ed, CAP voltage rises from 1.5V , and the inductor peak curren t rise gradually along with CAP voltage,
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 3 of 10 which achieve the soft -start. Soft -start function can help to restrain clash current to reduce LED stress during start up, which can extend the LED life. On the other hand, soft- start also can restrain clash voltag e on MOSFET ’s drain to increase the system reliability . 2.2.3 、Power Factor Correction After the system is stable, the voltage VCAP will be constant. The TCIL6568 achieve high PF though ensure MOSFET on time stable. The relation between Vin(t) , TON, L and inductor peak current I P(t) can be calculated as fallow : [ ]LED() - ()Vin t V Ton L Ip t×= × Vin(t) is a sinusoidal half -wave, and the envelope of inductor current peak value I P(t) fallow with the input voltage Vin(t), which makes the system achieve high PF. Inductor Current VIN(t) Fig.2 Power Factor Correction Scheme 2.2.4 、Constant Current Control The TCIL6568 employs unique constant current control method and works in boundary continuous mode , which could control the LED output current accurate ly. LED output current can be calculated as: CS REF R VIo = VREF -feedback loop reference voltage （typically 0.2V ） RCS-The sensing resistor connected between CS pin and GND 2.2.5 、Zero Current Detect When power MOSFET is off, the inductor current fall linearly from peak value to zero, also make supply power for LED load and charge the output capacitor through freewheeling diode. When inductor current falls to zero, the inductor voltage will fall to zero quickly . ZCD pin sense the inductor voltage through divide r resistor , and when detected voltage falls below V ZCD_FALL , turn on the M OSFET.
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 4 of 10 2.2.6 、Output Over -Voltage Protection The TCIL6568 detect the output voltage through ZCD pin during demagnetize process. When the voltage of ZCD pin exceed s the OVP threshold, the OVP signal will be triggered and latched, the MOSFET will be turn ed off and the IC work at quiescent mode, the VCC voltage dropped below the UVLO which will make the IC shut down and the system restarts again. The output OVP setting point can be calculated as: 1.6V1 _ ×+= R RRV OVPLED 1.6V Latc h TOVPS Vcc R2 L D2 R4 Fig. 3 Principle of VCC OVP To prevent OVP trigger falsely for inductor surge spike, the TCIL6568 designed LEB time to ensure zero current detect sample point fall in the flat range, which is shown in Fig.4. VZCD t TOVPS Sample Point Fig. 4 ZCD Pin V oltage and OVP Sample Point 2.2.7 、Output Short- Circuit Protection When the LED is shorted to ground, the output voltage is clamped to zero. The winding can’t supply current for Vcc , so Vcc will drop down. Since the Vcc is below VCC off voltage , the system will res tart and operate in hiccup mode until the shorted condition is removed.
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 5 of 10 2.2.8 、Intelligent Thermal Adjust To prevent from any lethal thermal damage, the TCIL6568 has internal intelligent thermal adjust function. When the inner temperature exceeds the threshold , the TCIL6568 decrease the output current gradually this can control the output power and temperature rising to improve the system reliability. The IC set the over temperature adjust threshold 150 ℃. 2. 3 、Pin Configuration 2. 4、Pin Description and Structure Scheme Pin Symbol Function I/O Structure Scheme 1 CAP Internal EA’s Output Pin. Connect a Capacitor to Ground I/O
2 GND Ground Pin P
3 VCC Supply V oltage Pin. P
4 ZCD Zero Current Detection Pin I/O
5，6 OUT The Drain of The Power MOSFET O 8 CS Current Sense P in. Source of Power MOSFET, and Connect a Resistor to Ground . I/O
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 6 of 10 3、Electrical Characteristics 3. 1 、Absolute Maximum Ratings Unless otherwise specified , Tamb = 25℃ Parameter Symbol Value Unit Supply V oltage (Note 1 ) VCC 7.5~25 V Peak Value of the Power MOSFET Drain V oltage VDS -0.3~ 600 V Low V oltage Terminal ( CS, CAP, ZCD) -0.3~6 V Maximum Clamp Current for VCC Pin ICC_MAX 10 mA Continuous Power Dissipation (Note 2) PDMAX 0.45 W Thermal resistance θJA 145 ℃/W Junction Temperature TJ -40 to 150 ℃ Storage Temperature TSTG -55 to 150 ℃ ESD (HBM) 2 kV Note 1：Exceed the limit parameter, the IC would be damaged . Note 2：The maximum power dissipation of IC fa lls along with the temperature, which determined by thermal resistance θJA, junction temperature T J and ambient temperature T A. The maximum allowed power dissipation is PDMAX =（TJMAX -TA） /θJA. 3. 2、Electrical Characteristics Unless otherwise specified , Tamb = 25 ℃ Parameter Symbol Test Conditions Value Unit Min. Typ. Max. Supply Voltage Supply range VCC 7.5 - 25 V VCC turn on threshold VCC_ON VCC Rising 15 17 19 V VCC turn off threshold VCC_OFF VCC Falling 6.5 7.5 9 V VCC Clamp V oltage VCC_CLAMP 20 VCC Start Up Current ICC_ON VCC Rising VCC=VCC_ON -1V 30 50 μA Operating current ICC_OP FOP=10kHz 300 600 μA Zero Current Detector (ZCD) Zero current detect threshold VZCD_FALL ZCD Falling 0.2 V Zero current detect hysteresis V ZCD_HYS ZCD Rising 0.15 V Output OVP Threshold VZCD_OVP 1.6 V Maximum On Time TON_MAX 20 μs Minimum Off Time TOFF_MIN 3 μs To be continued
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 7 of 10 Continued Parameter Symbol Test Conditions Value Unit Min. Typ. Max. Maximum Off Time TOFF_MAX 100 μs Current Sense Peak Value Limit for CS Pin VCS_LIMIT 1 V Leading Edge Blanking Time TLEB_CS 360 ns Turn off delay time TDELAY 110 ns Error AMP current detect threshold V REF 0.194 0.2 0.206 V Lower clamp voltage for CAP Pin VCAP_L 1.5 V Linear operation range of CAP Pin VCAP 1.5 3.9 V Higher clamp voltage for CAP VCAP_H 4.0 V Power MOSFET The turn -on resistor of MOSFET RDS_ON VGS =10V/I DS =0.5A TCIL6568- 7 9 12 Ω VGS =10V/I DS =1A TCIL6568- 14 4.5 6 Ω Breakdown V oltage of MOSFET BV DSS VGS =0V/I DS =250μA 600 V Leakage Current of MOSFET IDSS VGS =0V/V DS =600V 10 μA Intelligent Thermal Adjust Over temperature adjust threshold T ADJ 150 ℃
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 8 of 10 4、Typical Application Circuit and Information 4. 1、Application Circuit Fig.5 Typic al Application Circuit 4. 2、Application Instruction 1. The V CC bypass pin capacitor C 2 should be placed close to the V CC pin and GND pin . 2. The ground copper connected to CS sample resistor sh ould be as wide as possible and be minimized to ensure the veracity of current sensing . Otherwise, the regulate rate of output current will be effected. In addition , the signal ground copper should be connected to GND pin separately . 3. The voltage divider resistor connected to ZCD pin should be placed close to th e ZCD pin, and the node should be placed far from the OUT pin line. Otherwise, the system noise will lead OVP protection by error. Decrease the ZCD divider resistor over the same proportion could reduce the disturb ance from system noise. 5、Package Information （Unit: mm）
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 9 of 10 5. 1、Package Outline 5. 2、Dimensions Symbol Min. Max. Symbol Min. Max. A 4.95 5.15 C3 0.10 0.20 A1 0.37 0.47 C4 0.20 TYP A2 1.27 TYP D 1.05 TYP A3 0.41 TYP D1 0.50 TYP B 5.80 6.20 R1 0.07 TYP B1 3.80 4.00 R2 0.07 TYP B2 5.0 TYP θ1 17° TYP C 1.30 1.50 θ2 13° TYP C1 0.55 0.65 θ3 4° TYP C2 0.55 0.65 θ4 12° TYP
Continental Device India Pvt. Ltd An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company TCIL6568 TCIL6568_REV02_22102016 Datasheet Page 10 of 10 Disclaimer The product information and the selection guides facilitate selection of the CDIL's Discrete Semiconductor Device(s) best suited for application in your product(s) as per your requirement. It is recommended that you completely review our Data Sheet(s) so as to confirm that the Device(s) meet functionality parameters for your application. The information furnished in the Data Sheet and on the CDIL Web Site/CD are believed to be accurate and reliable. CDIL however, does not assume responsibility for inaccuracies or incomplete information. Furthermore, CDIL does not assume liability whatsoever, arising out of the application or use of any CDIL product; neither does it convey any license under its patent rights nor rights of others. These products are not designed for use in life saving/support appliances or systems. CDIL customers selling these products (either as individual Discrete Semiconductor Devices or incorporated in their end products), in any life saving/support appliances or systems or applications do so at their own risk and CDIL will not be responsible for any damages resulting from such sale(s). CDIL strives for continuous improvement and reserves the right to change the specifications of its products without prior notice. CDIL is a registered Trademark of Continental Device India Pvt. Ltd C-120 Naraina Industrial Area, New Delhi 110 028, India. Telephone + 91 -11-2579 6150, 4141 1112 Fax + 91 -11-2579 5290, 4141 1119 email@cdil.com www.cdil.com CIN: U32109DL1964PTC004291