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LC5222S Datasheet(PDF) 6 Page - Sanken electric |
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LC5222S Datasheet(HTML) 6 Page - Sanken electric |
6 / 11 page Functional Block Diagram Functional Block Diagram Control Part LC5220 6(7) 5(5,6) 4 1 8 3 2 OPP Logic Gate Driver UVLO TSD Band Gap Reference Regulator OCP Blanking PWM Control Reference Control CC_REF OCP_REF Output Control Logic TSD UVLO PWM OCP OPP SLEEP ENABLE REG VBB REF PWM GND Pin numbers in parentheses refer to the SOP8 package Current Detect CC OC SEN OUT PWM _IN SEN_IN Pin List Table Name Number Function DIP8 SOP8 REG 1 1 Internal regulator supply, provides current to internal and external circuits; connect a 0.1 μF bypass capacitor between this pin and GND. PWM 2 2 Input for PWM control: to use internal PWM, connect a capacitor for setting off-time; to use external PWM, connect to PWM signal source. REF 3 3 Reference voltage input: sets peak output current of OUT pin (internal power MOSFET) for internal PWM control, enables toggling output of OUT pin (Enable function), and enables latched shutdown of output (Sleep function) SEN 4 4 Output current detection: detects peak output current for internal PWM control, and detects overcurrent for OCP; connect to current detection resistor. OUT 5 5, 6 Drain of internal power MOSFET. VBB 6 7 Supply voltage, provides power to internal circuits through internal regulator. GND 8 8 Ground pin. ― 7 ― LC5220D DIP8 pin removed to increase creepage distance between high voltage pin and low voltage pin. Note: Apply user’s criteria for creepage distance when using LC5220S SOP8. 1 2 3 4 8 6 5 GND VBB OUT REG PWM REF SEN 1 2 3 4 8 7 6 5 GND VBB OUT OUT REG PWM REF SEN Pin-out Diagrams DIP8 (LC5220D series) SOP8 (LC5220S series) LC5222D/25D and LC5222S/25S 6 SANKEN ELECTRIC CO., LTD. LC5222D/25D_22S/25S-DS Off-Line DC/DC LED Driver ICs August 8, 2012 |
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