TDA4605 Datasheet, PDF (11/21 Pages) STMicroelectronics – CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

TDA 4605
Characteristics (cont’d)
T_A = 25 ˚C
Parameter
Symbol
Limit Values
Unit
min. typ. max.
Test Condition
Test
Circuit
Overload Range and Short-Circuit Operation
Overload range lower V_1U
limit
60 230 290 mV
Voltage gain in
V_Ü
1
2
3
overload range
Input current in short – I₁
circuit operation
90 120 180 µA
Peak value in
V_2Ü
overload range
3.0
V
Peak value in short V_2K
circuit operation
2.2 2.6 3.0 V
2
V_Ü = d
2
(V_2S – V_2B)/dV₁
V₁ = 0 V
2
V₁ = V_1R – 10 mV 2
V₁ = 0 V
2
Generally Valid Data (V₆ = 10 V)
Overload Point Correction
Overload point
– I₂
correction current
400 660 850 µA
V₃'= 4 V; V₂'= 0 V 1
Zero Transition Detector Voltage
Positive clamp
V_8P
0.70 0.75 0.80 V
I₈ = 1 mA
2
Negative clamp
V_8N
– 0.15 – 0.22 – 0.25 V
I₈ = – 1 mA
2
Threshold value
V_8S
40 50
mV
2
Input current
– I₈
2
4
µA
V₈ = 0
2
Delay time between t_d2
0.2 0.4 0.7 µs
2
V₈ and V₅
Zero detector disable t_UL
time
2
2
6
µs
Semiconductor Group
43