L6599AT STMicroelectronics, L6599AT Datasheet
L6599AT
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L6599AT Summary of contents
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... High efficiency industrial SMPS ■ AC-DC adapters, open frame SMPS Table 1. Device summary Order codes L6599ATD L6599ATDTR L6599ATN October 2009 Improved high-voltage resonant controller DIP16 Package SO16N SO16N DIP16 Doc ID 15534 Rev 3 L6599AT SO16N Packaging Tube Tape and reel Tube 1/31 www.st.com 31 ...
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... Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 Operation at no load or very light load . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.3 Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.4 Current sense, OCP and OLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.5 Latched shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.6 Line sensing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.7 Bootstrap section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2/31 Doc ID 15534 Rev 3 L6599AT ...
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... L6599AT 1 Device description The L6599AT is a temperature-extended version of the L6599A double-ended controller specifically designed for the series-resonant half-bridge topology. It provides a 50% complementary duty cycle: the high-side switch and the low-side switch are driven ON/OFF at 180° out-of-phase for exactly the same time interval. Output voltage regulation is obtained by modulating the operating frequency ...
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... Block diagram 2 Block diagram Figure 1. Block diagram 4/31 Doc ID 15534 Rev 3 L6599AT ...
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... L6599AT 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) that set both the maximum oscillator frequency and the time constant for the frequency shift that occurs as the chip starts up (soft-start). An internal switch discharges this capacitor every time the chip turns off (Vcc < ...
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... The information is latched and it is necessary to recycle the supply voltage of the IC to enable it to restart: the latch is removed as the voltage on the Vcc pin goes below the UVLO threshold. Tie the pin to GND if the function is not used. Doc ID 15534 Rev 3 L6599AT ...
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... L6599AT 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 the PFC controller, for protection purpose or during burst-mode operation. It goes low when the IC is shut down by DIS>1.85 V, ISEN > ...
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... Maximum pin voltage (Ipin ≤ 1 mA) Maximum source current Analog inputs & outputs Power dissipation @ °C (DIP16) A Power dissipation @ °C (SO16) A Junction temperature operating range Storage temperature Parameter Doc ID 15534 Rev 3 L6599AT Value Unit -1 to 618 -18 V BOOT 50 V/ns Self-limited V -0 ...
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... L6599AT 5 Electrical characteristics T = -40 to 125 °C, Vcc = kΩ; unless otherwise specified RFmin Table 5. Electrical characteristics Symbol IC supply voltage Vcc Operating range Vcc Turn-on threshold On Vcc Turn-off threshold Off Hys Hysteresis V Vcc clamp voltage Z Supply current I Start-up current start-up ...
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... Voltage rising Voltage rising Doc ID 15534 Rev 3 Min. Typ. Max. -1 (1) 1.78 1.85 1. 58.2 60 61.8 240 250 260 0.2 0.3 0.4 3.9 0.9 1.93 2 2.07 (1) 1.8 2 2.2 1 130 200 0.2 0.5 120 -1 (1) 1.2 1.24 1.28 50 0.5 100 150 200 (1) 1.98 2.05 2.12 (1) 3.35 3.5 3.65 L6599AT Unit µ kHz µ A/A 1 µA Ω V µA Ω µ µA µ ...
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... L6599AT Table 5. Electrical characteristics (continued) Symbol Vth Restart threshold 3 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 time r UVLO saturation High-side gate driver (voltages referred to OUT) ...
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... Application information 6 Application information The L6599AT is an advanced double-ended controller specifically designed for resonant half-bridge topology (see half-bridge leg are alternately switched on and off (180° out-of-phase) for exactly the same time interval. This is commonly referred to as operation at “50% duty cycle”, although the real duty cycle, that is the ratio of the on-time of either switch to the switching period, is actually less than 50% ...
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... L6599AT 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, which is alternately charged and discharged by the current defined with the network connected to pin 4 ( source capability and the higher the current sourced by the pin, the higher the oscillator frequency ...
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... RF ; min ⋅ ⋅ min in case burst-mode operation at no-load is Fmax Doc ID 15534 Rev ⋅ ⋅ min max (at minimum input voltage min RF = min RF max f − max 1 f min load). L6599AT ...
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... The L6599AT can be operated in burst-mode by using pin 5 (STBY): if the voltage applied to this pin falls below 1.24 V the IC enters an idle state where both gate-drive outputs are low, ...
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... IC as possible to reduce switching noise pick-up, helps get clean operation. To help the designer meet energy saving requirements even in power-factor-corrected systems, where a PFC pre-regulator precedes the DC-DC converter, the L6599AT allows the PFC pre-regulator to be turned off during burst-mode operation, thereby eliminating the ...
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... IC is idle during burst-mode operation. This signal is externally used for switching off the PFC controller and the pre-regulator as shown in Figure 9 . When the L6599AT is in UVLO the pin is kept open, to let the PFC controller start first Figure 8. ...
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... With the L6599AT, the converter's soft startup is easily achieved with the addition of an R-C series circuit from pin 4 (RF ...
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... L6599AT 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 significant signals during the soft-start phase. 6.4 Current sense, OCP and OLP The resonant half-bridge is essentially voltage-mode controlled; hence a current sense input only serves as overcurrent protection (OCP) ...
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... It is normal that the voltage on the ISEN pin could overshoot the 0.8 V. However, if the voltage on the ISEN pin reaches 1.5 V, the second comparator is triggered and the L6599AT shuts down and latches off with both the gate-drive outputs and the PFC_STOP pin low, hence turning off the entire unit ...
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... With the L6599AT the designer can externally program the maximum time T converter is allowed to run overloaded or under short-circuit conditions. Overloads or short- circuits lasting less than T immunity to short duration phenomena. If, instead, T (OLP) procedure is activated that shuts down the L6599AT and, in cases of continuous overload/short-circuit, results in continuous intermittent operation with a user-defined duty cycle. Figure 11 b can be operated in two different ways ...
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... As a rough indication, with C reaches 3.5 V. This phase lasts: Delay = ⋅ µF. During this time, the L6599AT runs at a Delay (see Section 6.3: Soft-start start is 3.5 V, the L6599AT stops switching and the Delay . The IC restarts when the voltage on C Delay ...
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... PFC pre-regulator front-end, the output voltage of the PFC stage, in which case the function serves as a power-on and power-off sequencing. L6599AT shutdown upon input undervoltage is accomplished by means of an internal comparator, as shown in the block diagram of available at pin 7 (LINE). The comparator is internally referenced to 1.24 V and disables the IC if the voltage applied at the LINE pin is below the internal reference ...
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... As an additional measure of safety (e.g. in cases where the low-side resistor is open or missing non-power factor corrected systems in cases of abnormally high input voltage) if the voltage on the pin exceeds 7 V, the L6599AT is shut down. If its supply voltage is always above the UVLO threshold, the IC restarts as the voltage falls below 7 V. ...
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... MOSFETs of the half-bridge leg is low, so that, generally point anyway and the following equation is useful to compute the drop on the bootstrap driver the L6599AT, a patented integrated structure replaces this BOOT Figure 14 b. rise is not an issue. However wise to check this ...
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... ON-time of the bootstrap driver, which charge − ⋅ 150 − − Drop ⋅ − ⋅ the internal DMOS. (DS)ON Doc ID 15534 Rev 3 L6599AT arg e is the on-resistance of the (DS)ON . For example, using ...
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... L6599AT Figure 15. Application example AC-DC adapter using L6563 and L6599AT Doc ID 15534 Rev 3 Application information 27/31 ...
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... Figure 16. DIP16 mechanical data DIM. MIN. a1 0. 28/31 mm inch TYP. MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 0.5 0.020 0.25 0.010 20 0.787 8.5 0.335 2.54 0.100 17.78 0.700 7.1 0.280 5.1 0.201 3.3 0.130 1.27 0.050 Doc ID 15534 Rev 3 L6599AT OUTLINE AND MECHANICAL DATA DIP16 ® ...
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... L6599AT Figure 17. SO16N mechanical data DIM. MIN 0 0. ( (1) 3 4. (1) "D" and "F" do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (.006inc.) mm inch TYP. MAX. MIN. TYP. MAX. 1.75 0.069 ...
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... Revision history 8 Revision history Table 6. Document revision history Date 05-Jun-2009 11-Aug-2009 30-Oct-2009 30/31 Revision 1 Initial release. 2 Updated Table 5 on page 9 3 Updated Table 5 on page 9 Doc ID 15534 Rev 3 L6599AT Changes ...
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... L6599AT 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. ...