TL2843B-Q1_15 Datasheet, PDF (4/18 Pages) Texas Instruments – HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER

TL2843B-Q1
SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012
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REFERENCE 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
Output voltage
Line regulation
Load regulation
Average temperature coefficient of output voltage
I_O = 1 mA, T_J = 25°C
V_CC = 12 V to 25 V
I_O = 1 mA to 20 mA
4.95
5
5.05 V
6
20 mV
6
25 mV
0.2
0.4 mV/°C
Output voltage, worst-case variation
Output noise voltage
Output-voltage long-term drift
Short-circuit output current
V_CC = 12 V to 25 V,
I_O = 1 mA to 20 mA
f = 10 Hz to 10 kHz, T_J = 25°C
After 1000 h at T_J = 25°C
4.9
5.1 V
50
μV
5
25 mV
–30
–100
–180 mA
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
OSCILLATOR SECTION⁽¹⁾ ELECTRICAL CHARACTERISTICS
V_CC = 15 V⁽²⁾, 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⁽³⁾
UNIT
MAX
Initial accuracy
Voltage stability
Temperature stability
T_J = 25°C
T_A = T_low to T_high
T_J = 25°C, R_T = 6.2 kΩ, C_T = 1 nF
V_CC = 12 V to 25 V
49
52
55
48
56 kHz
225
250
275
0.2
1%
5
%
Amplitude
Peak to peak
1.7
V
Discharge current⁽⁴⁾
T_J = 25°C, R_T/C_T = 2 V
R_T/C_T = 2 V
7.8
8.3
8.8
mA
7.5
8.8
(1) Output frequency equals oscillator frequency for the TL2842B and TL2843B. Output frequency is one-half the oscillator frequency for the
TL2844B and TL2845B.
(2) Adjust V_CC above the start threshold before setting it to 15 V.
(3) All typical values are at T_J = 25°C.
(4) Specified by design. Not production tested.
4
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