EVAL6569 STMicroelectronics, EVAL6569 Datasheet - Page 3

• 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

Figure 5: Bootstrap capacitor charge.
Figure 6: Basic diagram for 2x105 W lamp ballast in full bridge configuration.
Typical industrial TL ballasts requires complex
control with dimming or automation interface.
Here the L6569 is a driver between the power
and control blocks. To use it with an external os-
cillator, pin CF is used as an 0-12V logic input,
and the L6569 becomes a high voltage buffer.
Applications with power above 150W require a full
bridge inverter. Figure 6 shows how two L6569
drive such a MOSFET bridge. If no external con-
trol is required, the first L6569 master can control
the switching with its oscillator, and synchronizes
the other driver as (slave).
OSCILLATOR
EXTERNAL
D02IN1386
V
S
15.6 V
GND
RF
CF
V
S
L6569
L6569
BOOT
HVG
OUT
LVG
100nF
LOGIC
47
47
600V
CHARGE PUMP CIRCUIT
STB9NK50Z
ON
The L6569 start up
Two versions of the L6569 are available with dif-
ferent start up characteristics. The L6569 drives
the lower MOSFET ON at power-up until the sup-
ply voltage reaches the Under Voltage Lock Out.
The bootstrap capacitor is precharged to 4.6V
and both the lower and the upper MOSFETs will
switch immediately with the oscillator. This is in-
tended for inverters which use only one DC block-
ing capacitor connected to the power ground, as
shown on figure 4 for CFL ballast.
120
HV
AN880 APPLICATION NOTE
100nF
47
47
BOOT
ON
HVG
OUT
LVG
L6569
V
RF
CF
GND
S
3/14