TFS757 Datasheet, PDF (28/36 Pages) Power Integrations, Inc. – Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs

TFS757-764HG
Parameter
Symbol
Standby Circuit Protection (cont.)
ENABLE Pin Current
Limit Selection Range #2
I_LIM(2)(DSB)
Conditions
SOURCE = 0 V; T_J = 0 °C to 100 °C
(Unless Otherwise Specified)
Start-up
Min
Typ
Max
8.5-18
ENABLE Pin Current
Limit Selection Range #3
I_LIM(3)(DSB)
Start-up
18-33
ENABLE Pin Current
Limit Selection Range #4
I_LIM(4)(DSB)
Start-up
33-60
I_LIM(1)(DSB)
I_L = 20 mA, di/dt = 95 mA/ms, T_J = 25 °C
450
500
550
I_LIM(2)(DSB) I_L = 20 mA, di/dt = 125 mA/ms, T_J = 25 °C
600
650
700
Standby Current Limit
I_LIM(3)(DSB) I_L = 20 mA, di/dt = 143 mA/ms, T_J = 25 °C
675
750
825
I_LIM(4)(DSB) I_L = 20 mA, di/dt = 105 mA/ms, T_J = 25 °C
495
550
605
Δ I_LIM
I_LIM (I_L = 100 mA) / I_LIM (I_L = 20 mA)
di/dt = 125 mA/ms
80
General Circuit Protection
Power Coefficient
I²f
I f = I × f 2
LIM(2)(DSB)(TYP) S(SB)(OSC)(TYP)
T_J = 25 °C
0.9 × I²f
I²f
1.12 × I²f
Initial Current Limit
Leading Edge
Blanking Time (Main)
I_INIT
t_LEB(D)
T_J = 25 °C
T_J = 25 °C
0.75 ×
I_LIM(MIN)
170
215
Leading Edge Blanking
Time (Standby)
t_LEB(DSB)
T_J = 25 °C
170
215
Current Limit
Delay (Main)
t_ILD(D)
T_J = 25 °C
150
Current Limit
Delay (Standby)
t_ILD(DSB)
T_J = 25 °C
150
Thermal Shutdown
Temperature
T_SD
118
Thermal Shutdown
Hysteresis
T_SD(HYST)
55
Auto-Restart ON-Time
at f_OSC Standby
t_AR
T_J = 25 °C
64
Auto-Restart Duty
Cycle Standby
DC_AR
T_J = 25 °C
2.2
Supply Current
I_S1
DRAIN Supply Current
I_S2
NOTES:
EN Current > I_DIS
(No MOSFETs Switching)
EN Open (Standby MOSFET
Switching at f_OSC)
400
750
1000
600
950
1200
A. The current limit is boosted for the first 34 ms of main supply switching and returns to normal level after this period.
B. V_DDH(SHUNT) minus V_{DDH(UV_ON)} is equal to 250 mV minimum.
C. Level 1 R_FB = open, Level 2 R_FB = 511 kW, Level 3 R_FB = 232 kW.
D. Level 1 R_EN = open, Level 2 R_EN = 280 kW, Level 3 R_EN = 137 kW, Level 4 R_EN = 63.4 kW.
Units
mA
mA
mA
mA
%
A²Hz
ns
ns
ns
ns
°C
°C
ms
%
mA
28
Rev. C 02/11
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