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| SG6518 -- LCD Power Supply Supervisor December 2007 SG6518 LCD Power Supply Supervisor Features Two Adjustable Voltage Sense Input Pins: VSV1 and VSV2 Over-voltage Protection (OVP) for 5V, 12V, and two outputs: V1, V2 Over-current Protection (OCP) for 5V, 12V, and two outputs: V1, V2 Adjustable Voltage Control Sense Input of V1 and V2 (ADJ-V1, ADJ-V2) Open-drain Output for FPO Pin 13ms PSON Control Delay No Lockup During the Fast AC Power-on/off Wide Supply Voltage Range: 4V to 15V Programmable Over-temperature Protection (OTP) Description SG6518 provides the over-voltage protection (OVP) for 5V, 12V, and outputs V1 and V2 as well as over-current protection (OVP) for 5V, 12V, and outputs V1 and V2. When the voltage of OTP pin decreases to 1.2V, the over-temperature protection (OTP) function is enabled. FPO is set to HIGH to turn off the PWM control IC. The voltage difference across the external current shunt is used for OCP functions. An external resistor can be used to adjust protection threshold. The power supply is turned on after a 13ms delay time when the PSON signal is set from LOW to HIGH. To turn off the power supply, PSON signal is set from HIGH to LOW with the delay time 13ms. Applications LCD Power Supply Ordering Information Part Number SG6518DZ SG6518SZ Operating Temperature Range -40C to +85C -40C to +85C Package 16-DIP 16-SOP Packing Method Rail Reel & Tape All packages are lead free per JEDEC: J-STD-020B standard. (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com SG6518 -- LCD Power Supply Supervisor Application Diagram Figure 1. Typical Application Note: 1. R1 = 200 and R2 = 200 are suggested. 2. C1 and C2 are suggested to be 100nF to 2.2uF. Internal Block Diagram Figure 2. Function Block Diagram Note: 3. The VSV1 pin is the power pin for the two OCP comparators. (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 2 SG6518 -- LCD Power Supply Supervisor Pin Configuration Figure 3. Pin Configuration Pin Definitions Pin # 1 2 3 4 5 6 7 8 9 Name GND FPO PSON VSV1 ADJ-V1 RI ADJ-V2 VSV2 ISV2 Description Ground. Fault protection output. Output signal to control the primary PWM IC through an opto-coupler. When FPO is LOW, the PWM IC is enabled. Remote on/off logic input from CPU or main-board. The power supply is turned on/off after 13ms delay. V1 voltage sense input. (4) V1 over-voltage control sense input. Reference setting. One external resistor, Ri, connected between the RI and GND pins determines a reference current, IREF = 1.5V/Ri, for OCP programming. V2 over-voltage control sense input. V2 voltage sense input. V2 over-current protection sense input. In typical applications, this pin is connected to the positive end of a current shunt through one resistor. When the voltage on ISV2 is higher than that of VSV2 by 6mV, OCP is enabled. VSV1 over-current protection sense input. In typical applications, this pin is connected to the positive end of a current shunt through one resistor. When the voltage on ISV1 is higher than that of VSV1 by 6mV, OCP is enabled. 12V over-current protection sense input. In typical applications, this pin is connected to the positive end of a current shunt through one resistor. When the voltage on IS12 is higher than that of VS12 by 6mV, OCP is enabled. 12V over-voltage control sense input. 5V over-current protection sense input. In typical applications, this pin is connected to the positive end of a current shunt through one resistor. When the voltage on IS5 is higher than that of VS5 by 6mV, OCP is enabled. 5V over-voltage control sense input. Supply voltage, 4V ~ 15V. For general applications, it is connected to 5V-standby for supply voltage. For over-temperature protection. An external NTC thermistor is connected from this pin to ground. The impedance of the NTC decreases at high temperatures. Once the voltage of the OTP pin drops below a fixed limit of 1.2V, FPO is open-drain output. 10 ISV1 11 12 13 14 15 16 IS12 VS12 IS5 VS5 VDD OTP Note: 4. The VSV1 pin is the power pin for the two OCP comparators; it must be higher than VSV2. (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 3 SG6518 -- LCD Power Supply Supervisor Timing Diagram Figure 4. PSON On/Off and 5V, 12V, V1, V2, OVP, and OCP Functions (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 4 SG6518 -- LCD Power Supply Supervisor Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. All voltage values, except differential voltages, are given with respect to GND pin. Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. Symbol VDD VI VOUT PD TJ TSTG TL ESD DC Supply Voltage Parameter ISV1, ISV2, VSV1, VSV2 Input Voltage Output Voltage Power Dissipation Operating Free Junction Temperature Range Storage Temperature Range Lead Temperature (Wave Soldering, 10 Seconds) Electrostatic Discharge Capability, Human Body Model Electrostatic Discharge Capability, Machine Model PSON, IS12,VS12 ADJ-V1, ADJ-V2, IS5, VS5, OTP, RI FPO Min. -0.3 -0.3 -0.3 -0.3 -40 -55 Max. 16 30.0 15.0 7.0 15.0 400 +125 +150 +260 2.5 200 Unit V V V mW C C C kV V Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol VDD TA DC Supply Voltage Parameter Min. 4 -40 Max. 15 +85 Unit V C Operating Ambient Temperature Range (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 5 SG6518 -- LCD Power Supply Supervisor Electrical Characteristics Unless otherwise noted, operating specifications are VDD = 5V, TA=+25C Symbol VDD SECTION VDD IDD tR VST Parameter DC Supply Voltage Supply Current Supply Voltage Rising Time VDD Start Threshold Voltage Over-Voltage Protection VS5 Over-Voltage Protection VS12 Ratio of Current Sense Sink Current to Current Sense Setting Pin (RI) Source Current OCP Comparator Input Offset Voltage Leakage Current (FPO) Low Level Output Voltage (FPO) OVP Delay Time OCP Delay Time RI Pin Voltage Start-up OCP Protection Delay Time Normal Voltage of ADJ-V1 & ADJ-V2 Over-Voltage Protection of ADJ-V1 & ADJ-V2 Input Pull-low Resistor High-level Input Voltage Low-level Input Voltage Conditions Min. 4 Typ. Max. 15 Units V mA ms 1.5 1 4 5.7 13.2 RI = 23K ~ 120K 7.6 -7 FPO = 5V ISINK 10mA 33 12.5 1.455 FPO = LOW 158 1.455 1.455 75 20.0 1.50 200 1.50 1.80 6.1 13.8 8.0 6.5 14.4 8.4 7 5 0.5 110 27.5 1.545 242 1.545 1.545 V Over-Voltage and Over-Current Protection (OVP, OCP) VOVP V IREF VOFFSET ILKG-FPO VOL-FPO tOVP tOCP VRI tST-OCP VADJNOR VADJOVP mV A V s ms V ms V V ADJ Section PSON Control RPSON VIH VIL 50 2 1 PSON HIGH to FPO LOW PSON LOW to FPO HIGH 6 6 13 13 20 20 100 K V V ms ms tPSON Timing PSON to On/Off Over-Temperature Protection (OTP) IOTP VOTP-OFF tOTP Ratio of OTP Source Current to Current Sense Setting Pin (RI) Source Current Threshold Voltage for OTP Over-Temperature Debounce 5.82 1.164 225 6.00 1.200 325 6.18 1.236 425 V s (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 6 SG6518 -- LCD Power Supply Supervisor Typical Performance Characteristics These characteristic graphs are normalized at TA = 25C. 1.5 1.4 8.4 8.3 8.2 IDD (mA) 1.3 8.1 IREF 1.2 1.1 1.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 8.0 7.9 7.8 7.7 7.6 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature Temperature Figure 5. Supply Current Figure 6. Ratio of Sense Sink Current Sense Setting Pin (RI) Source Current 5 4 3 30 VOFFSET (mV) 2 1 0 -1 -2 -3 -4 -5 -40 -25 -10 5 20 35 50 65 80 95 110 125 25 tOCP (ms) 20 15 10 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature Temperature Figure 7. OCP Comparator Input Offset Voltage Figure 8. OCP Delay Time 1.60 100 1.55 90 1.50 tOVP (us) -40 -25 -10 5 20 35 50 65 80 95 110 125 VRI (V) 80 1.45 70 1.40 60 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature Temperature Figure 9. RI Pin Voltage Figure 10. OVP Delay Time 0.6 110 100 0.5 VOL_FPO (V) 0.4 RPSON (k) -40 -25 -10 5 20 35 50 65 80 95 110 125 90 80 70 60 0.3 0.2 50 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature Temperature Figure 11. Low Level Output Voltage (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 Figure 12. Input Pull-low Resistor www.fairchildsemi.com 7 SG6518 -- LCD Power Supply Supervisor Applications Information (OCP) The SG6518 provides over-current protection for the 5V, 12V, and two outputs: V1, V2. When an OCP condition occurs at any of the voltage rails, FPO opens. The internal OCP comparators have a very small offset voltage (6mV). The sink currents of IS5, IS12, ISV1, and ISV2 are eight times the current at the RI pin. The current at the RI pin is VRI/Ri. Here is an example demonstrating how to set the over-current protection. If I1 * R1 > (IRI * 8) * R2, OCP is active. To select R2 Resistor: If R1 = 5m, Ri = 51k, OCP Protection Level is 5A, then R2 = (I1 * R1)/(IRI * 8) = (5A * 5m) / {(1.5V / 51K) * 8} = 106 Figure 13. Over-Current Protection (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 8 SG6518 -- LCD Power Supply Supervisor Physical Dimensions D 16 9 E1 1 8 E eB A2 L e b1 A1 A Figure 14. 16-Pin, Dual Inline Package (DIP)(D) Dimensions Symbol A A1 A2 b b1 D E E1 e L eB Millimeter Min. 0.381 3.175 Typ. Max. 5.334 3.302 1.524 0.457 19.177 7.620 6.299 2.540 3.302 9.017 7 3.429 Inch Min. 0.015 0.125 Typ. Max. 0.210 0.130 0.060 0.018 0.755 0.300 0.248 0.100 0.130 0.355 7 0.135 18.669 6.121 2.921 8.509 0 19.685 6.477 3.810 9.525 15 0.735 0.241 0.115 0.335 0 0.775 0.255 0.150 0.375 15 Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild's worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor's online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 9 SG6518 -- LCD Power Supply Supervisor Physical Dimensions (Continued) 16 9 E H Detail A 1 b e 8 F c D A2 y A1 A L Detail A Figure 15. 16-Pin, Small-Outline Package (SOP)(S) Dimensions Symbol A A1 A2 b c D E e H L F y Millimeter Min. 1.346 0.101 1.244 Typ. Max. 1.753 0.254 1.499 0.406 0.203 Inch Min. 0.053 0.004 0.049 Typ. Max. 0.069 0.010 0.059 0.016 0.008 9.804 3.810 1.270 5.791 0.406 0.381X45 0 10.008 3.988 6.198 1.270 0.101 8 0.386 0.150 0.050 0.228 0.016 0.015X45 0 0.394 0.157 0.244 0.050 0.004 8 Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild's worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor's online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 10 SG6518 -- LCD Power Supply Supervisor (c) 2007 Fairchild Semiconductor Corporation SG6518 * Rev. 1.0.0 www.fairchildsemi.com 11 |
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