EVAL6569 STMicroelectronics, EVAL6569 Datasheet - Page 6

• Manufacturer Part Number: EVAL6569
• Description: BOARD EVAL LIGHTING L6569
• Manufacturer: STMicroelectronics
• Type: Charge Pumpsr

Specifications of EVAL6569

• Mfg Application Notes: L6569, AN880 App Note
• Main Purpose: Lighting, Ballast Control
• Embedded: No
• Utilized Ic / Part: L6569
• Primary Attributes: 18 W, Optimized for a CF18DT/E/830, 120 or 230 VAC
• Secondary Attributes: Preheating Done with a PTC
• Input Voltage: 230 V
• Product: Power Management Modules
• Supply Current: 0.17 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6569
• Other names: 497-4738

AN880 APPLICATION NOTE
charged and the circuit can restart immediately.
This method is suitable when the inverter uses
only one DC blocking capacitor connected to the
power ground, as used on figure 11 for Compact
Fluorescent Lamp. Pulling the V
the UVLO turns off the oscillator and gives the
same bridge configuration.
For the L6569A, discharging the V
the UVLO turns off both MOSFETs. An SCR like
the X0202MA may be used for the reset function.
If the current flowing through the supply resistor is
Figure 11: L6569 shutdown through the C
Figure 12: Shutdown with a thyristor & a serial resistor to slow down the supply voltage decay.
Figure 13: L6569 disable circuitry with both MOSFETs off.
6/14
shutdown
DISABLE
V
C
IN
Rs
S
S
R
voltage below
HCF4011
supply below
L
R
R
F
C
F
F
oscillator pin.
5.6k
R
L 6569
Vs
L 6569A
higher than the SCR holding current (see figure
12), the SCR will remain on and the two MOS-
FETs off. Removing power or commutating the
SCR allows a new start up [4].
Otherwise a disable circuitry that turns off the two
MOSFETs (see figure13), can achieve the shut-
down function. Compared to the SCR solution,
the shutdown is immediate and the inverter can
restart on the disable order.
VS
RF
CF
GND
L6569
4.7 k W
BOOT
HVG
OUT
LVG
ON
BC327
200
200
OFF
OFF
100nF
22
H.V.