LM34926 Datasheet, PDF (6/28 Pages) Texas Instruments – LM34926 Integrated Secondary-Side Bias Regulator for Isolated DC-DC Converters

LM34926
SNVS847E – JUNE 2012 – REVISED DECEMBER 2014
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6.6 Switching Characteristics
Typical values correspond to T_J = 25°C. Minimum and maximum limits apply over –40°C to 125°C junction temperature range
unless otherwise stated. V_IN = 48 V unless otherwise stated.
MIN
TYP
MAX
UNIT
ON-TIME GENERATOR
T_ON Test 1
T_ON Test 2
T_ON Test 3
T_ON Test 4
MINIMUM OFF-TIME
V_IN = 32 V, R_ON = 100 kΩ
V_IN = 48 V, R_ON = 100 kΩ
V_IN = 75 V, R_ON = 250 kΩ
V_IN = 10 V, R_ON = 250 kΩ
270
188
250
1880
350
250
370
3200
460
ns
336
ns
500
ns
4425
ns
Minimum Off-Timer
FB = 0 V
144
ns
6.7 Typical Characteristics
100
90
VIN=36V _VIN=24V
VIN=48V
80
70
60
VOUT2=10V, IOUT1=0
50
50 100 150 200 250 300
LOAD CURRENT (mA)
Figure 1. Efficiency at 750 kHz, V_OUT1 = 10 V
Figure 2. V_CC vs V_IN
Figure 3. V_CC vs I_CC
Figure 4. I_CC vs External V_CC
6
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