STEVAL-ISA018V1 STMicroelectronics, STEVAL-ISA018V1 Datasheet - Page 4

• Manufacturer Part Number: STEVAL-ISA018V1
• Description: BOARD EVAL BASED ON L6599
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISA018V1

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 150W
• Voltage - Output: 24V
• Current - Output: 6A
• Voltage - Input: 185 ~ 265 or 85 ~ 185 VAC
• Regulator Topology: Resonant
• Board Type: Fully Populated
• Utilized Ic / Part: L6599
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8265

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Demonstration board description
Demonstration board description
The STEVAL-ISA018V1 board is based on an LLC resonant converter, and employs the
5 Ω, 500 V STF21NM50N power MOSFET as the primary switches in the half-bridge. The
STF21NM50N is produced using STMicroelectronics’ proprietary high voltage MDmesh™ II
technology. Thanks to this technology, the switch features a very low R
gate charge and high switching performance. The device is available in different packages,
i.e. the TO-220, TO-247 and TO-220FH.
The demonstration board has been designed based on the specifications listed in
Table 1.
The electrical schematic of the board is shown in
with a connector for line input and a jumper for voltage double operation for a 110 Vac input
voltage.
The output voltage is available on the CN3 connector. The converter is controlled by the
L6599, a double ended primary controller for resonant half-bridge ZVS (zero voltage
switching). The IC controls the output power, changing the switching frequency and
controlling the half-bridge with a constant 50% duty cycle by means of a dedicated pin,
connected to the output feedback through an optocoupler. Light load conditions are
managed, with optimized consumption, thanks to burst mode operation. The IC also
includes a disable function and two-level over-current protection with programmable delay.
In order to properly run the half-bridge devices and guarantee high efficiency, the IC
features an internal P- channel D-MOS transistor with a typical R
switching element to avoid the use of a bootstrap capacitor.
During normal operation the IC is powered by the auxiliary winding of the transformer via the
D9 diode. A discrete linear voltage regulator is connected in order to stabilize the auxiliary
voltage fluctuations. The circuit consists of Q4, C42, R38, D3, D12, C32 and C33.
Input frequency range
Input voltage range
Output voltage
Output power
Parameter
Safety
Main specifications
EMI
Doc ID 15906 Rev 1
a. 185 to 265 Vac - b. 85 to 185 Vac (with voltage double)
Figure
150 W (240Wpk)
24 V ± 2%
2. The input section is provided
EN60950
EN55014
50/60 Hz
Value
DS(on)
DS(on)
of 200 mΩ as a
per area, low
Table
UM0727
1.