TL384XB Datasheet, PDF (7/21 Pages) Texas Instruments – HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

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TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A – AUGUST 2006 – REVISED SEPTEMBER 2006
Output Section Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
High-level output voltage
Low-level output voltage
Rise time
Fall time
UVLO saturation
I_OH = –20 mA
I_OH = –200 mA
I_OL = 20 mA
I_OL = 200 mA
C_L = 1 nF, T_J = 25°C
C_L = 1 nF, T_J = 25°C
V_CC = 5 V, I_OL = 1 mA
13
13.5
12
13.5
0.1
0.4
1.5
2.2
50
150
50
150
0.7
1.2
13
13.5
12
13.5
0.1
1.5
50
50
0.7
V
0.4
V
2.2
150 ns
150 ns
1.2 V
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
Undervoltage-Lockout Section Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
Start threshold voltage
TLx842B, TLx844B
TLx843B, TLx845B
15
16
7.8
8.4
17
14.5
9
7.8
16
17.5
V
8.4
9
Minimum operating voltage
after start-up
TLx842B, TLx844B
TLx843B, TLx845B
9
10
11
8.5
10
11.5
V
7
7.6
8.2
7
7.6
8.2
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
Pulse-Width Modulator Section Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
Maximum duty cycle
TL3842B, TL3843B
TL3844B, TL3845B
94
96
100
94
96
100
%
47
48
50
47
48
50
Minimum duty cycle
0
0%
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
Supply Voltage Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
Start-up current
0.3
0.5
0.3
0.5 mA
Operating supply current
Limiting voltage
VFB and I_SENSE at 0 V
I_CC = 25 mA
11
17
11
17 mA
30
34
30
34
V
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
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