TDA4605 Datasheet, PDF (3/6 Pages) STMicroelectronics – CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

TDA4605
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Pin
V₁
1
V₂
2
V₃
Supply Voltage
3
V₄
4
V6
6
V7
7
I₁
1
I₂
2
I₃
3
I4
Supply Current
tp ≤ 50µs, V ≤ 0.1
4
I5
tp ≤ 50µs, V ≤ 0.1
5
I₆
t_p ≤ 50µs, V ≤ 0.1
6
I7
7
I₈
8
Tj
Junction Temperature (autom. thermal disjunction)
Tstg Storage Temperature
Value
Unit
-0.3, +3
V
-0.3
V
-0.3
V
-0.3
V
-0.3, +20
V
-0.3
V
3
mA
3
mA
3
mA
- 1.5
A
-0.5, +1.5
A
0.5
A
3
mA
-3, +3
mA
+125
o_C
-40, +125
o_C
THERMAL DATA
Symbol
R_th(j-a)
R_th(j-c)
Tamb
Parameter
Junction-ambient Thermal Resistance
Junction-case Thermal Resistance
Ambient Temperature
Value
80
45
-20, +85
Unit
o_C/W
o_C/W
o_C
ELECTRICAL CHARACTERISTICS (V_CC = 10V, T_amb = 25^oC, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
START-UP HYSTERESIS
I_6E0 Start-up Current Drain
V6E Switch-on Voltage
V6A Switch-off Voltage
I6E1 Switch-on Current
I_6A1 Switch-off Current
V₆ = V_6E
V6 = V6E
V₆ = V_6A
0.6 0.8 mA
11
12
13
V
4.5
5
5.5 V
11
mA
10
mA
VOLTAGE CLAMP (V6 = 10V, IC Switched off)
V_2(Max.) At Pin 2 (V₆ < V_6E)
V3(Max.) At Pin 3 (V6 < V6E)
I₂ = 1mA
I3 = 1mA
5.6 6.6
9
V
5.6 6.6
9
V
CONTROL RANGE
V1R Control Input Voltage
400 410 420 mV
-V_R Voltage Gain of the Control Circuit in the Control V_R = d(V_2S - V_2B)/dV₁
43
dB
Range
f = 1kHz
PRIMARY CURRENT SIMULATION VOLTAGE
V_2B Basic Value
0.955 1.00 1.03 V
OVERLOAD RANGE AND SHORT CIRCUIT OPERATION
V2O Peak Value in the Range of Secondary Overload V1 = V1R - 10mV
DV2 Maximum Ramp Amplitude
V2O - V2B
V_2S Peak Value in the Range of Secondary Short
Circuit Operation
V₁ = 0
2.8 2.95 3.1 V
1.82 1.95 2.08 V
2.3 2.5 2.7 V
FOLDBACK POINT CORRECTION
-I₂
Foldback Point Correction Current
V₃ = 3.7V
300 500 650 µA
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