L6520 STMICROELECTRONICS [STMicroelectronics], L6520 Datasheet
L6520
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L6520 Summary of contents
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... Block diagram March 2011 Applications ■ Electronic ballasts (TL, Industrial CFL) ■ Integrated CFLs Table 1. Device summary Order codes L6520 L6520TR L6521 L6521TR Doc ID 16998 Rev 3 L6520 L6521 SO8 Package Packaging Tube Tape and reel SO8 Tube Tape and reel 1/19 www.st.com 19 ...
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... Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 Hard switching protection (HSP Overcurrent protection (OCPH) during ignition mode . . . . . . . . . . . . . . 11 Overcurrent protection (OCPL) during run mode . . . . . . . . . . . . . . . . . . 11 Choke saturation control (CSC) during ignition and run mode . . . . . . . 12 Doc ID 16998 Rev 3 L6520, L6521 ...
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... L6520, L6521 1 Description The L6520/1 is the first highly integrated ballast controller in the market able to drive both BJTs and MOSFETs, providing all the necessary protections to ensure the maximum reliability of the application in compliance with major safety and power consumption regulations. By adopting BJTs switches in the application, the IC allows to replace more expensive MOSFETs, strongly reducing the system cost without compromises ...
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... LSD 6 HSD 7 VCC 8 4/19 Description Preheating frequency programming and ignition modes selection Window comparator input Current sensing input Half bridge middle point monitor IC power and signal ground Low side driver output High side driver output Power supply Doc ID 16998 Rev 3 L6520, L6521 ...
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... L6520, L6521 3 Maximum ratings Table 3. Absolute maximum ratings Symbol Pin Parameter V 8 Active clamp protection voltage Active clamp protection current VCC Differential voltage between V 6,7 OD1 driver output and V Differential voltage between V 6,7 OD2 driver output and GND V 1 FPRE positive voltage ...
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... AMB °C AMB Iload = 300 mA Doc ID 16998 Rev 3 L6520, L6521 Min. Typ. Max. (1) 10.5 13.5 15 10.5 11.5 12.5 16.5 17.5 18 130 CC 8 (2) 150 49.5 50 1.24 1.42 46 46.6 47.2 43.2 96 100 (1) ( L6520 1.5 (2) ( L6521 0.8 (2) 85 -2.75 -500 200 202 192 1 Unit 16 200 µ 220 µA 50.5 % µs 1 ...
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... L6520, L6521 Table 5. Electrical characteristics (continued) Symbol Pin V HSD LSD Output high voltage OH I HSD LSD Peak source current SRC I HSD LSD Peak sink current SNK T HSD LSD Rise time RISE T HSD LSD Fall time FALL I HSD LSD Pull down current ...
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... PWM_det comparator. DEAD 4. Guaranteed by testing logic verification. 8/19 Parameter Test condition ( °C AMB V = 1.5V (source) EOL V = 3.5V (sink) EOL ( °C AMB Doc ID 16998 Rev 3 L6520, L6521 Min. Typ. Max. Unit 255 ns 2.43 2.5 2.57 V 3.84 4 4.16 V 0.96 1 1.04 V 8.2 9.1 10 µA 1 ...
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... Preheating and instant start The preheating time is 1.5 s (typ.) in the L6520 and 0.8 s (typ.) in the L6521. The FPRE pin embeds a precise current reference: the voltage read by this pin sets the preheating frequency or enables the instant start. If the FPRE pin is connected to ground, the instant start is active and the IC runs immediately into ignition sequence from the starting frequency of 85 kHz. If the pin FPRE is connected to a resistor equal or higher than 196 Ω ...
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... When driving MOSFET no storage time is present, therefore the resulting dead time is equal to (1.42 µs). 10/19 DEAD Doc ID 16998 Rev 3 L6520, L6521 / 2.75 kHz/ms. If IGN , 1.42 us typ.) once the DEAD is the sum of a fixed time, ...
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... L6520, L6521 5.6 Current control circuit (CCC) The current control circuit (CCC sophisticated circuit able to protect the ballast against any possible failure. It limits the maximum lamp voltage during ignition (OCPH), overcurrent protection (OCPL) during run mode, chokes saturation control (CSC) and hard switching protection (HSP) ...
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... The EOL pin is biased to the center of the window comparator by means of an OTA (2.5 V typ. with +/- 1.5 V typ. window), having a current capability equal to 9.1 µA (typ.). 12/19 /dt during ignition whereas, during run mode, the df IGN Doc ID 16998 Rev 3 L6520, L6521 / 500 Hz/ms, until the CCC /dt decreasing CCC ...
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... L6520, L6521 5.8 Summary of protections Figure 3. Summary of protections Table 7. Table of faults Active during Fault PH Ign Run Minimum driving pulse duration Inductor saturation Hard switching Overcurrent End Of Life Condition Driving pulses shorter than 1 µs HBCS TxL and TxM thresholds crossed in less than 255 ns ...
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... Figure - Doc ID 16998 Rev 3 L6520, L6521 Frequencies vs temperature Temperature [ C] FPRE resistance converter temperature behavior Temperature [ C] LSG and HSG output voltage vs temperature (driver's current: 300mA Temperature [ C] 75 5.01 5.005 5 4 ...
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... L6520, L6521 7 Application examples Figure 10. BJT application example Figure 11. MOSFET application example Doc ID 16998 Rev 3 Application examples 15/19 ...
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... Min Typ Max 1.35 1.75 0.10 0.25 1.10 1.65 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 5.80 6.20 0.25 0.50 0.40 1.27 0° (min.), 8° (max.) 0.10 Doc ID 16998 Rev 3 L6520, L6521 www.st.com. inch Min Typ Max 0.053 0.069 0.004 0.010 0.043 0.065 0.013 0.020 0.007 0.010 0.189 0.197 0.15 0.157 0.050 0.228 0.244 0.010 0.020 0.016 0.050 0.004 ® ...
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... L6520, L6521 Figure 12. Package dimensions Doc ID 16998 Rev 3 Package mechanical data 17/19 ...
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... Document revision history Date 19-Jan-2010 08-Feb-2011 09-Mar-2011 18/19 Revision 1 Initial release Added: L6521 option, 2 Updated: Coverpage, Table 7, Figure 10, Figure 11 3 Datasheet updated from preliminary data to final datasheet Doc ID 16998 Rev 3 L6520, L6521 Changes Section 6: Typical electrical characteristics Figure 1, Table 4, Table 5, Section 1, Figure 3, ...
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... L6520, L6521 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...