LTC3722-2_15 Datasheet, PDF (6/28 Pages) Linear Technology – Synchronous Dual Mode Phase Modulated Full Bridge Controllers

LTC3722-1/LTC3722-2
TYPICAL PERFORMANCE CHARACTERISTICS
Slope Current vs Temperature
90
80
C_T = 2.25V
70
60
50
40
C_T = 1V
30
20
10
0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
372212 G10
V_CC Shunt Voltage vs Temperature
10.5
I_CC = 10mA
10.4
10.3
10.2
10.1
10.0
9.9
9.8
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
372212 G11
Delay Pin Threshold
vs Temperature
2.4
2.3
SBUS = 2.25V
2.2
2.1
2.0
1.9
1.8
1.7
1.6
SBUS = 1.5V
1.5
1.4
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
372212 G12
FB Input Voltage vs Temperature
1.210
1.209
1.208
1.207
1.206
1.205
1.204
1.203
1.202
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
372212 G13
Delay Timeout vs R_DPRG
300
T_A = 25°C
250
SBUS = 2.25V
200
SBUS = 1.5V
150
SBUS = 1.125V
100
50
0
10 60 110 160 210 260 310
R_DPRG (kΩ)
372212 G14
ZVS Delay in Fixed Mode,
SBUS = 5V
300
T_A = 25°C
250
ADLY = PDLY = 2.25V
200
ADLY = PDLY = 1.5V
150
ADLY = PDLY = 1.125V
100
50
0
10 60 110 160 210 260 310
R_DPRG (kΩ)
372212 G15
Synchronous Driver Turn-Off
Delay in Fixed Mode
350
T_A = 25°C
300
250
200
150
100
50
0
10
60
110
160
210
R_SPRG (kΩ)
372212 G16
Synchronous Driver Turn-Off Delay in
Adaptive Mode, SBUS = 1.5V
260 ^{TA = 25°C}
220
B HI-F LOW
180
A HI-E LOW
140
100
60
20
10 30 50 70 90 110 130 150 170 190
R_SPRG (kΩ)
372212 G17
372212fb
6
For more information www.linear.com/LTC3722