L6571AD STMicroelectronics, L6571AD Datasheet - Page 6

• Manufacturer Part Number: L6571AD
• Description: IC DRVR HALF BRDG HV OSC 8-SOIC
• Manufacturer: STMicroelectronics
• Type: High Voltage Half Bridger

Specifications of L6571AD

• Configuration: Half Bridge
• Input Type: Self Oscillating
• Current - Peak: 175mA
• Number Of Configurations: 1
• Number Of Outputs: 2
• High Side Voltage - Max (bootstrap): 600V
• Voltage - Supply: 10 V ~ 16.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Supply Voltage (min): 10 V
• Supply Current: 25 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Bridge Type: Half Bridge
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Delay Time: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5361-5; L6571AD

Oscillator frequency
4
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Oscillator frequency
The frequency of the internal oscillator can be programmed using external resistor and
capacitor.
The nominal oscillator frequency can be calculated using the following equation:
Equation 1
Where R
The device can be driven in "shut down" condition keeping the C
some cares have to be taken:
1.
2.
Figure 3.
Figure 4.
When CF is to GND the high side driver is off and the low side is on
The forced discharge of the oscillator capacitor C
simple way to do this is to limit the current discharge with a resistive path imposing
R · C
F
F
and C
> 1 μs (see fig.1)
Fault signal
Waveforms
F
are the external resistor and capacitor.
Doc ID 4946 Rev 6
F
must not be shorter than 1us: a
F
pin close to GND, but
L6571A - L6571B