L6911B View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
L6911B Datasheet PDF : 7 Pages
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L6911B
PIN FUNCTION (continued)
N°
Name
Description
20
RT
Oscillator Switching frequency pin. Connecting an external resistor from this pin to ground the
switching frequency is increased according to the equation:
fS
=
200kHz
+
5 ⋅ 106
RT(KΩ)
Connecting the resistor from this pin and the Vcc the Switching frequency is reduced
according to the equation:
fS
=
200kHz
−
4 ⋅ 107
RT(KΩ)
If the pin is not connected the switching frequency is 200kHz.
ELECTRICAL CHARACTERISTICS
Symbol
Parameter
VCC SUPPLY CURRENT
ICC
Supply current
POWER-ON
Rising VCC Threshold
Falling VCC Threshold
Rising VOCSET Threshold
OSCILLATOR
Free Running Frequency
Total Variation
∆Vosc
Ramp Amplitude
REFERENCE and DAC
DACOUT voltage Accuracy
ERROR AMPLIFIER
DC Gain
GBW Gain-Bandwidth Product
SR
Slew Rate
GATE DRIVERS
IUGATE
Upper Gate Source
RUGATE Upper Gate Sink
ILGATE
Lower Gate Source
RLGATE Lower Gate Sink
PROTECTION
Overvoltage Trip
(VSEN/DACOUT)
IOCSET
OCSET Current Source
IOVP
OVP Sourcing Current
ISS
Soft Start Current
4/7
Test Condition
UGATE and LGATE open
VOCSET = 4.5V
VOCSET = 4.5V
RT = open
RT to GND >6kΩ,
RT to VCC = 12V > 200kΩ
RT = open
VID0, VID1, VID2, VID3 see
Table1
COMP = 10pF
VBOOT - Vphase = 12V,
VUGATE = 6V
ILGATE = 0.3A
VCC = 12V, VLGATE = 6V
ILGATE = 0.3A
VOCSET = 4.5VDC
VSEN = 5.5V, VOVP = 0V
Min. Typ. Max. Unit
-
5
-
mA
-
-
4.6
V
3.6
-
-
V
-
1.26
-
V
185 200 215 kHz
-15
-
15
%
-
1.9
-
V
-1
-
1
%
-
88
-
dB
-
15
-
MHz
-
10
-
V/µs
0.6
1
-
A
-
1.5
3
Ω
1.2
2
-
A
-
1
2
Ω
-
115 120
%
170 200 230
µA
60
mA
10
µA
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