SY6818PLC

Application Note: SY6818 High Current Overvoltage Protection Switch With Integrated Reverse Blocking FET Features SY6818 is an over voltage protection switch with high current capability to prevent damage to the downstream system with low voltage rating. It achieves wide input voltage range from 2.5VDC to 30VDC. Programmable OVP is available with simple external resistor divider. Integrated reverse blocking FET up to 20V rating prevents the leakage current from output side to input side when the input power supply is removed, but without output discharging. Extremely low power path resistance RPWPT helps to reduce power loss during the normal operation. Enable control is available to cut off the energy path. High accuracy current indicator is employed internally. It integrates the overtemperature protection shutdown and auto-recovery with hysteresis to protect against over temperature events. It has a default over current protection up to 5A internally and auto-recovery. Each auto-recovery process is composed of deglitch time TDG and switch turn-on time TON. This IC along with CSP-12, 1.73mmx1.73mm footprint provides small PCB area application.  VIN=2.5V to 30V  Integrated reverse blocking FET up to 20V rating for high voltage charging mode  Extremely Low Power Path Resistance RPWPT  RPWPT=53mΩ typ.  Programmable OVP thru external resistor divider, accuracy up to +/-3%  Internal Soft Start to Prevent In-rush Current  Thermal Shutdown Protection & Auto Recovery  Current Indicator with High Accuracy up to +/-5%  RoHS Compliant and Halogen Free  Compact package: CSP-12 (1.73mmx1.73mm) Ordering Information SY6818 □(□□)□  Smart Phone  Tablet PCs  Mobile Device on fi Temperature Code Package Code Optional Spec Code Applications de nti a lP rep are dF or W OO KO O General Description Ordering Number SY6818PLC Package Type Note orp .C CSP1.73x1.73-12 yC Typical Applications CIN 1uF Sil erg VIN 2.5-30V ROVP1 COUT 1uF IN OUT IN IN OUT OUT IN SY6818 OVP OUT EN ISNS ROVP2 GND VOUT OFF ON RSNS Figure 1. Schematic Diagram AN_SY6818 Rev. 0.9B © 2018 Silergy Corp. Silergy Corp. Confidential-Prepared for Customer Use Only 1 All Rights Reserved. AN_SY6818 Pinout (top view) A B C ISNS IN OUT GND IN OUT OVP IN OUT EN IN OUT OO KO O 1 2 3 or W 4 OUT ISNS C1,C2,C3,C4 A1 EN A4 OVP A3 GND A2 Pin Description Power input pin. Connect IN pin together. Decouple high frequency noise by connecting at least 0.1uF MLCC to ground. Output voltage pin. Connect OUT pins together for normal operation. Current indicator pin. Connect a resister RSNS from this pin to ground. The current flow is mirrored internally to charge RSNS for the indication. The ratio of power current to mirrored current is 2.5k. The voltage on ISNS pin equals to VISNS=(IOUT/2.5k)*RSNS. EN control pin. High logic enables all the internal circuit; low logic disables the internal energy flow path. External OVP program pin. Connect resistor divider to this pin to program the OVP threshold. The internal reference is at 1.26V. Pull down this pin to ground to disable external program function. Power ground pin. rep are Pin Number B1,B2,B3,B4 de nti a lP Pin Name IN dF ① Part Number Package type Top Mark SY6818PLC CSP1.73x1.73-12 ZQxyz Note① ： x=year code, y=week code, z= lot number code. on fi Absolute Maximum Ratings (Note 1) orp .C IN, EN, OVP, ---------------------------------------------------------------------------------------------------------------------------------------------------- 30V OUT, -------------------------------------------------------------------------------------------------------------------------------------------------------------- 20V ISNS, --------------------------------------------------------------------------------------------------------------------------------------------------------------- 6V Continues IN, OUT current, ------------------------------------------------------------------------------------------------------------------------------------- 3A Peak IN, OUT current (10ms), ---------------------------------------------------------------------------------------------------------------------------------- 5A Power Dissipation, PD @ TA = 25°C CSP, -------------------------------------------------------------------------------------------------------------- 1.67 W Package Thermal Resistance (Note 2) yC θ JA --------------------------------------------------------------------------------------------------------------------------------------------60 °C/W θ JC --------------------------------------------------------------------------------------------------------------------------------------------- 7 °C/W erg Junction Temperature Range ------------------------------------------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions (Note 3) Sil IN, EN, OVP, ----------------------------------------------------------------------------------------------------------------------------------------- less than 30V OUT, ---------------------------------------------------------------------------------------------------------------------------------------------------- less than 20V ISNS, ---------------------------------------------------------------------------------------------------------------------------------------------------- less than 6V Continues IN, OUT current, ------------------------------------------------------------------------------------------------------------------------- less than 3A Peak IN, OUT current (10ms), ---------------------------------------------------------------------------------------------------------------------- less than 5A Junction Temperature Range --------------------------------------------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range ---------------------------------------------------------------------------------------------------------------------- -40°C to 85°C AN_SY6818 Rev. 0.9B © 2018 Silergy Corp. Silergy Corp. Confidential-Prepared for Customer Use Only 2 All Rights Reserved. AN_SY6818 Block Diagram OO KO O Protection FET Reverse blocking FET OUT Soft Start Charge Pump Current Sense Control Logic EN CTRL ISNS OVP GND rep are EN dF UVLO or W IN Sil erg yC orp .C on fi de nti a lP Thermal Detect AN_SY6818 Rev. 0.9B © 2018 Silergy Corp. Silergy Corp. Confidential-Prepared for Customer Use Only 3 All Rights Reserved. AN_SY6818 Electrical Characteristics (VIN = 2.5V to 30V, RISNS=1k, CIN=1uF, COUT=1uF, TA = 25°C, unless otherwise specified) Symbol VIN VUVLO VHYS VRB IBIAS IRB Shutdown Current ISD Enable Threshold VEN OVP Program Threshold Resistance of Power Path VOVP RPWPT Current Indicator Accuracy VISNS Maximum Current Capability Note4 Output Load Capacitance IMAX COUT Deglitch Time TDG Switch Turn-On Time TON Thermal Shutdown Temperature Thermal Shutdown Hysteresis TSD THYS Test Conditions Min 2.5 Typ 1.22 30 186 380 1.26 53 200 400 5 6 11 1000 16 Unit V V V V µA µA µA µA V V V mΩ mV mV A µF ms Max 30 2.4 0.7 1.2 1.7 ms 0.1 20 VIN=5V VIN=0V, VOUT=16V, EN=0V VIN=5V, EN=0V VIN=30V, EN=0V Rising Falling 100 2 6 9 OO KO O Parameter Input Voltage Range Input UVLO Threshold UVLO Hysteresis Reverse Blocking Range Bias Current Reverse Blocking Current 5 10 15 1.2 or W VIN=5V, IOUT=200mA, from IN to OUT IOUT=0.5A, RSNS=1k IOUT=1.0A, RSNS=1k rep are dF VIN=5V Time from 2.5V