TL2843B-Q1 Datasheet, PDF (6/16 Pages) Texas Instruments – HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER

TL2843B-Q1
SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012
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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⁾
UNIT
MAX
High-level output voltage
Low-level output voltage
Rise time⁽³⁾
Fall time⁽³⁾
UVLO saturation⁽³⁾
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
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.
(3) Specified by design. Not production tested.
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⁾
UNIT
MAX
Start threshold voltage
7.8
8.4
9V
Minimum operating voltage after start-up
7
7.6
8.2 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.
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
UNIT
Maximum duty cycle⁽³⁾
94
96
100
%
Minimum duty cycle
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.
(3) Specified by design. Not production tested.
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⁾
UNIT
MAX
Start-up current
0.3
0.5 mA
Operating supply current
Limiting voltage
VFB and I_SENSE at 0 V
I_CC = 25 mA
11
17 mA
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.
6
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