L6599ADTR STMicroelectronics, L6599ADTR Datasheet

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... Desktop PC, entry-level server ■ Telecom SMPS ■ High efficiency industrial SMPS ■ AC-DC adapter, open frame SMPS Table 1. Device summary Order codes L6599AD L6599ADTR L6599AN October 2009 Improved high-voltage resonant controller DIP16 Package SO16N SO16N DIP16 Doc ID 15308 Rev 4 L6599A SO16N ...

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Contents Contents 1 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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L6599A 1 Device description The L6599A is an improved revision of the previous L6599 double-ended controller specific for the series-resonant half-bridge topology. It provides 50% complementary duty cycle: the high-side switch and the low-side switch are driven ...

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Block diagram 2 Block diagram Figure 1. Block diagram 4/31 Doc ID 15308 Rev 4 L6599A ...

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L6599A 3 Pin connection Figure 2. Pin connection (top view) Table 2. Pin description Pin N# Type 1 Css 2 DELAY 3 CF Function Soft-start. This pin connects an external capacitor to GND and a resistor to RFmin (pin 4) ...

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Pin connection Table 2. Pin description (continued) Pin N# Type 4 RFmin 5 STBY 6 ISEN 7 LINE 8 DIS 6/31 Function Minimum oscillator frequency setting. This pin provides a precise 2 V reference and a resistor connected from this ...

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L6599A Table 2. Pin description (continued) Pin N# Type 9 PFC_STOP 10 GND 11 LVG 12 Vcc 13 N.C. 14 OUT 15 HVG 16 VBOOT Function Open-drain ON/OFF control of PFC controller. This pin, normally open, is intended for stopping ...

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Electrical data 4 Electrical data 4.1 Absolute maximum ratings Table 3. Absolute maximum rating Symbol Pin V 16 BOOT V 14 OUT dV /dt 14 OUT Vcc PFC_STOP I 9 PFC_STOP V 7 LINEmax I 4 RFmin ...

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L6599A 5 Electrical characteristics 105 °C, Vcc = 15 V, VBOOT = kΩ; unless otherwise specified) RFmin Table 5. Electrical characteristics Symbol IC supply voltage Vcc Operating range Vcc ...

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Electrical characteristics Table 5. Electrical characteristics (continued) Symbol DIS function I Input bias current DIS Vth Disable threshold Oscillator D Output duty cycle f Oscillation frequency osc T Dead-time D V Peak value CFp V Valley value CFv V Voltage ...

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L6599A Table 5. Electrical characteristics (continued) Symbol Low-side gate driver (voltages referred to GND) V Output low voltage LVGL V Output high voltage LVGH I Peak source current sourcepk I Peak sink current sinkpk t Fall time f t Rise ...

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Application information 6 Application information The L6599A is an advanced double-ended controller specific for resonant half-bridge topology (see Figure are alternately switched on and off (180° out-of-phase) for exactly the same time. This is commonly referred to as operation at ...

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L6599A Figure 4. Typical system block diagram 6.1 Oscillator The oscillator is programmed externally by means of a capacitor (CF), connected from pin 3 (CF) to ground, that will be alternately charged and discharged by the current defined with the ...

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Application information Figure 5. Oscillator's internal block diagram The following approximate relationships hold for the minimum and the maximum oscillator frequency respectively: Equation 1 After fixing CF in the hundred the nF (consistently with the maximum source ...

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L6599A Figure 6. Oscillator waveforms and their relationship with gate-driving signals In Figure 6 the timing relationship between the oscillator waveform and the gate-drive signal, as well as the swinging node of the half-bridge leg (HB) is shown. Note that ...

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Application information Figure 7. Burst-mode implementation: a) narrow input voltage range; b) wide input voltage range Essentially, RF max enter burst-mode operation. Once fixed fmax, RF Equation 3 Note that, unlike the associated to some load Pout ...

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L6599A no-load consumption of this stage (0.5 1 W). There is no compliance issue in that because EMC regulations on low-frequency harmonic emissions refer to nominal load, no limit is envisaged when the converter operates with light or no load. ...

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Application information 6.3 Soft-start Generally speaking, purpose of soft-start is to progressively increase converter's power capability when it is started up avoid excessive inrush current. In resonant converters the deliverable power depends inversely on frequency, then soft- ...

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L6599A Equation 5 where f is recommended least 4 times f start quite empirical and is a compromise between an effective soft-start action and an effective OCP (see next section). Please refer to the timing diagram of ...

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Application information Figure 11. Current sensing techniques: a) with sense resistor, b) “lossless”, with capacitive shunt The L6599A is equipped with a current sensing input (pin 6, ISEN) and a sophisticated overcurrent management system. The ISEN pin is internally connected ...

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L6599A The circuit shown in is small (not above some hundred Ω, just to limit current spiking) the circuit series operates like a capacitive current divider; C less and will be a low-loss type, the sense resistor ...

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Application information Figure 12. Soft-start and delayed shutdown upon overcurrent timing diagram This function is realized with pin 2 (DELAY), by means of a capacitor C resistor R connected to ground. As the voltage on the ISEN pin exceeds 0.8 ...

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L6599A The timing diagram of voltage of the L6599A (Vcc) falls below the UVLO threshold the IC keeps memory of the event and will not restart immediately after Vcc exceeds the start-up threshold if V(DELAY) is still higher than 0.3 ...

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Application information Figure 13. Line sensing function: internal block diagram and timing diagram With reference to (Vin ) and OFF (Vin ON Equation 11 Vin which, solved for R Equation 12 While the line undervoltage is active the start-up generator ...

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L6599A the function is not used the pin has to be connected to a voltage greater than 1.24 V but lower than 6V (worst-case value of the 7 V threshold). 6.7 Bootstrap section The supply of the floating high-side section ...

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Application information Equation 13 where Qg is the gate charge of the external power MOS, R bootstrap DMOS (150 W, typ.) and T equals about half the switching period minus the dead time T MOSFET with a total gate charge ...

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L6599A Figure 15. Application example: 90W AC/DC adapter using L6563 and L6599A Doc ID 15308 Rev 4 Application information 27/31 ...

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Package mechanical data 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...

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L6599A Figure 17. SO16N mechanical data DIM. MIN 0 0. ( (1) 3 4. (1) "D" and "F" do not ...

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Revision history 8 Revision history Table 6. Document revision history Date 19-Jan-2009 25-Feb-2009 13-Mar-2009 30-Oct-2009 30/31 Revision 1 Initial release 2 Updated Table 5 on page 9 3 Updated data on Table 5 on page 9 4 Updated Table 5 ...

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... L6599A 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. ...