TDA4605 Datasheet, PDF (10/21 Pages) STMicroelectronics – CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

TDA 4605
Characteristics
T_A = 25 ˚C
Parameter
Symbol
Limit Values
Unit
min. typ. max.
Test Condition
Test
Circuit
Start-Up Hysteresis
Start-up current
Switch-on voltage
Switch-off voltage
Switch-on current
Switch-off current
I _6E0
V_6E
V_6A
I _6E1
I _6A1
0.5 1.1 1.6 mA
11 12 13 V
6.4 6.9 7.4 V
7
9
12 mA
6.5 8
10 mA
Voltage Clamp (V₆ = 10 V, IC switched off)
At pin 2 (V₆ ≤ V_6E) V_{2 max} 5.6 6.6 7.6 V
At pin 3 (V₆ ≤ V_6E) V_{3 max} 5.6 6.6 7.6 V
Regulation Range
Regulation input
voltage
Voltage gain
regulation range
Regulation
transmittance
V_1R
– V_R
R_R
370 400 430 mV
47 50 53 dB
20
kΩ
Primary Current Reproducer
Basic value
V_2B
Input resistance
R _2B
R_2B = ∆V_2B/∆I_2B
0.90 1.00 1.15 V
25 40 Ω
Slew rate
dV₂/dt
–1
V
falling edge
V₆ = V_6E
1
1
1
V₆ = V_6E
1
V₆ = V_6A
1
I ₂ = 1 mA
1
I ₃ = 1 mA
1
2
V_R = d
2
(V_2S – V_2B)/– dV₁
R_R = d
2
(V_2S – V_2B)/– dI₁
2
V₃ = 1.5 V;
2
1.2 V < V₂ < 3 V
0.1 mA < I _2B < 3 mA
2
Semiconductor Group
42