STEVAL-ISA018V1 STMicroelectronics, STEVAL-ISA018V1 Datasheet - Page 4
![BOARD EVAL BASED ON L6599](/photos/9/13/91312/steval-isa018v1_sml.jpg)
STEVAL-ISA018V1
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
1
4/18
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.