L6599A Datasheet PDF – Resonant Controller – ST

Part Number : L6599A

Function : Improved high-voltage resonant controller

Package : DIP 16, SO16N

Manufacturers : STMicroelectronics ( https://www.st.com/ )

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L6599A Resonant Controller


The L6599A is an improved revision of the previous L6599. It is a double-ended controller specific to series-resonant half bridge topology. It provides 50% complementary duty cycle: the high-side switch and the low-side switch are driven ON/OFF 180° out-of-phase for exactly the same time. Output voltage regulation is obtained by modulating the operating frequency. A fixed deadtime inserted between the turn-off of one switch and the turn-on of the other guarantees soft-switching and enables high-frequency operation.

To drive the high-side switch with the bootstrap approach, the IC incorporates a high-voltage floating structure able to withstand more than 600 V with a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode. The IC enables the designer to set the operating frequency range of the converter by means of an externally programmable oscillator.

At startup, to prevent uncontrolled inrush current, the switching frequency starts from a programmable maximum value and progressively decays until it reaches the steady-state value determined by the control loop. This frequency shift is non-linear to minimize output voltage overshoots; its duration is programmable as well.


L6599A datasheet pinout


1. 50% duty cycle, variable frequency control of resonant half bridge
2. High-accuracy oscillator
3. Up to 500 kHz operating frequency
4. Two-level OCP: frequency-shift and latched shutdown
5. Interface with PFC controller
6. Latched disable input
7. Burst mode operation at light load
8. Input for power-ON/OFF sequencing or brownout protection
9. Non-linear soft-start for monotonic output voltage rise
10. 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
11. -300/800 mA high-side and low-side gate drivers with UVLO pull-down

L6599A Datasheet PDF Download

Other data sheets within the file : L6599AN, L6599AD, L6599ADTR

L6598D Datasheet – Resonant Controller – STMicroelectronics

Part Number : L6598D


Category :

Power Management  > AC-DC Converters > Resonant Controllers > L6598

Package : L6598 Dip 16 pin Type, L6598D SMD 16 pin Type

Manufactures : STMicroelectronics

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Description :

The L6598 device is manufactured with the BCD™ offline technology, able to ensure voltage ratings up to 600 V, making it perfectly suited for AC/DC adapters and wherever a resonant topology can be beneficial. The device is intended to drive two power MOSFETs, in the classical half bridge topology. A dedicated timing section allows the designer to set soft-start time, soft-start and minimum frequency. An error amplifier, together with the two enable inputs, are made available. In addition, the integrated bootstrap diode and the Zener clamping on low voltage supply, reduces to a minimum the external parts needed in the applications.


L6598D Datasheet


1. High voltage rail up to 600 V
2. dV/dt immunity ±50 V/ns in full temperature range
3. Driver current capability: 250 mA source 450 mA sink
4. Switching times 80/40 ns rise/fall with 1 nF load
5. CMOS shutdown input
6. Undervoltage lockout
7. Soft-start frequency shifting timing
8. Sense op amp for closed loop control or protection features
9. High accuracy current controlled oscillator
10. Integrated bootstrap diode
11. Clamping on Vs


Officail Homepage : http://www.st.com/en/power-management/l6598.html

L6598D Datasheet