TL5001AIP [TI]
PULSE-WIDTH-MODULATION CONTROL CIRCUITS; 脉宽调制控制电路
| 型号： | TL5001AIP |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| 文件： | 总23页 (文件大小：348K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
D, JG OR P PACKAGE
(TOP VIEW)
Complete PWM Power Control
3.6-V to 40-V Operation
Internal Undervoltage-Lockout Circuit
Internal Short-Circuit Protection
Oscillator Frequency . . . 20 kHz to 500 kHz
OUT
GND
RT
DTC
SCP
1
2
3
4
8
7
6
5
V
CC
COMP
FB
Variable Dead Time Provides Control Over
Total Range
FK PACKAGE
(TOP VIEW)
±3% Tolerance on Reference Voltage
(TL5001A)
Available in Q-Temp Automotive
HighRel Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards
3
4
2
1
20 19
NC
NC
RT
18
17
16
15
14
V
5
6
7
CC
NC
NC
DTC
NC
description
COMP
NC
The TL5001 and TL5001A incorporate on a single
monolithic chip all the functions required for a
pulse-width-modulation (PWM) control circuit.
Designed primarily for power-supply control, the
TL5001/A contains an error amplifier, a regulator,
an oscillator, a PWM comparator with a
dead-time-control input, undervoltage lockout
8
9
10 11 12 13
(UVLO), short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical
reference voltage tolerance of ±3% compared to ±5% for the TL5001.
The error-amplifier common-mode voltage ranges from 0 V to 1.5 V. The noninverting input of the error amplifier
is connected to a 1-V reference. Dead-time control (DTC) can be set to provide 0% to 100% dead time by
connecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with
an external resistor to GND. During low V conditions, the UVLO circuit turns the output off until V recovers
CC
CC
to its normal operating range.
The TL5001C and TL5001AC are characterized for operation from –20°C to 85°C. The TL5001I and TL5001AI
are characterized for operation from –40°C to 85°C. The TL5001Q and TL5001AQ are characterized for
operation from –40°C to 125°C. The TL5001M and TL5001AM are characterized for operation from –55°C to
125°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(P)
CERAMIC DIP
(JG)
CHIP CARRIER
(FK)
TL5001CD
TL5001ACD
TL5001ID
TL5001AID
TL5001QD
TL5001AQD
—
TL5001CP
—
—
–20°C to 85°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
TL5001ACP
—
—
TL5001IP
—
—
TL5001AIP
—
—
—
—
—
—
—
—
—
—
TL5001MJG
TL5001AMJG
TL5001MFK
TL5001AMFK
—
The D package is available taped and reeled. Add the suffix R to the device type (e.g., TL5001CDR).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
schematic for typical application
V
I
+
TPS1101
V
O
+
2
V
CC
1
3
5
SCP
V
O
COMP
TL5001/A
DTC
6
7
4
FB
RT
GND
8
functional block diagram
V
DTC
6
RT
7
OUT
1
CC
2
UVLO
I
DT
2.5 V
1 V
1 V
1.5 V
Reference
Voltage
OSC
PWM/DTC
Comparator
Error
Amplifier
SCP
Comparator 1
+
–
4
3
FB
COMP
SCP
Comparator 2
5
SCP
8
GND
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
detailed description
voltage reference
A 2.5-V regulator operating from V
is used to power the internal circuitry of the TL5001 and TL5001A and
CC
as a reference for the error amplifier and SCP circuits. A resistive divider provides a 1-V reference for the error
amplifier noninverting input which typically is within 2% of nominal over the operating temperature range.
error amplifier
The error amplifier compares a sample of the dc-to-dc converter output voltage to the 1-V reference and
generates an error signal for the PWM comparator. The dc-to-dc converter output voltage is set by selecting
the error-amplifier gain (see Figure 1), using the following expression:
V
= (1 + R1/R2) (1 V)
O
TL5001/A
3
4
COMP
FB
Compensation
Network
R1
V
I(FB)
–
To PWM
Comparator
R2
+
V
ref
= 1 V
8
GND
Figure 1. Error-Amplifier Gain Setting
The error-amplifier output is brought out as COMP for use in compensating the dc-to-dc converter control loop
for stability. Because the amplifier can only source 45 µA, the total dc load resistance should be 100 kΩ or more.
oscillator/PWM
The oscillator frequency (f ) can be set between 20 kHz and 500 kHz by connecting a resistor between RT
osc
and GND. Acceptable resistor values range from 15 kΩ to 250 kΩ. The oscillator frequency can be determined
by using the graph shown in Figure 5.
The oscillator output is a triangular wave with a minimum value of approximately 0.7 V and a maximum value
of approximately 1.3 V. The PWM comparator compares the error-amplifier output voltage and the DTC input
voltage to the triangular wave and turns the output transistor off whenever the triangular wave is greater than
the lesser of the two inputs.
dead-time control (DTC)
DTC provides a means of limiting the output-switch duty cycle to a value less than 100%, which is critical for
boost and flyback converters. A current source generates a reference current (I ) at DTC that is nominally
DT
equaltothecurrentattheoscillatortimingterminal, RT. ConnectingaresistorbetweenDTCandGNDgenerates
a dead-time reference voltage (V ), which the PWM/DTC comparator compares to the oscillator triangle wave
DT
as described in the previous section. Nominally, the maximum duty cycle is 0% when V is 0.7 V or less and
DT
100% when V is 1.3 V or greater. Because the triangle wave amplitude is a function of frequency and the
DT
source impedance of RT is relatively high (1250 Ω), choosing R
for a specific maximum duty cycle, D, is
DT
accomplished using the following equation and the voltage limits for the frequency in question as found in
Figure 11 (V max and V min are the maximum and minimum oscillator levels):
osc
osc
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
dead-time control (DTC) (continued)
R
R
1250 D V
max – V
osc
min
osc
V
min
osc
t
DT
Where
R
and R are in ohms, D in decimal
t
DT
SoftstartcanbeimplementedbyparallelingtheDTCresistorwithacapacitor(C )asshowninFigure2. During
DT
soft start, the voltage at DTC is derived by the following equation:
–t R
C
DT DT
–e
1
V
I
R
DT
DT DT
6
DTC
TL5001/A
C
R
DT
DT
Figure 2. Soft-Start Circuit
If the dc-to-dc converter must be in regulation within a specified period of time, the time constant, R
C
,
DT DT
should be t /3 to t /5. The TL5001/A remains off until V ≈ 0.7 V, the minimum ramp value. C is discharged
0
0
DT
DT
every time UVLO or SCP becomes active.
undervoltage-lockout (UVLO) protection
The undervoltage-lockout circuit turns the output transistor off and resets the SCP latch whenever the supply
voltage drops too low (approximately 3 V at 25°C) for proper operation. A hysteresis voltage of 200 mV
eliminates false triggering on noise and chattering.
short-circuit protection (SCP)
The TL5001/A includes short-circuit protection (see Figure 3), which turns the power switch off to prevent
damage when the converter output is shorted. When activated, the SCP prevents the switch from being turned
on until the internal latching circuit is reset. The circuit is reset by reducing the input voltage until UVLO becomes
active or until the SCP terminal is pulled to ground externally.
When a short circuit occurs, the error-amplifier output at COMP rises to increase the power-switch duty cycle
in an attempt to maintain the output voltage. SCP comparator 1 starts an RC timing circuit when COMP exceeds
1.5 V. If the short is removed and the error-amplifier output drops below 1.5 V before time out, normal converter
operation continues. If the fault is still present at the end of the time-out period, the timer sets the latching circuit
and turns off the TL5001/A output transistor.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
short-circuit protection (SCP) (continued)
2.5 V
R
185 kΩ
12 kΩ
SCP
SCP
Comparator 2
C
SCP
5
SCP
To Output
Drive Logic
From Error
Amp
Q1
V
ref
= 1 V
SCP
1.5 V
Comparator 1
Q2
Figure 3. SCP Circuit
Thetimeroperatesbycharginganexternalcapacitor(C ), connectedbetweentheSCPterminalandground,
SCP
towards 2.5 V through a 185-kΩ resistor (R
). The circuit begins charging from an initial voltage of
SCP
approximately 185 mV and times out when the capacitor voltage reaches 1 V. The output of SCP comparator
2 then goes high, turns on Q2, and latches the timer circuit. The expression for setting the SCP time period is
derived from the following equation:
–t
(
)
V
2.5 0.185 1
e
0.185
SCP
Where
τ = R
C
SCP SCP
The end of the time-out period, t
, occurs when V
= 1 V. Solving for C
yields:
SCP
SCP
SCP
C
12.46
t
SCP
SCP
Where
t is in seconds, C in µF.
must be much longer (generally 10 to 15 times) than the converter start-up period or the converter will not
t
SCP
start.
output transistor
The output of the TL5001/A is an open-collector transistor with a maximum collector current rating of 21 mA and
a voltage rating of 51 V. The output is turned on under the following conditions: the oscillator triangle wave is
lower than both the DTC voltage and the error-amplifier output voltage, the UVLO circuit is inactive, and the
short-circuit protection circuit is inactive.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Amplifier input voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
I(FB)
Output voltage, V , OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V
O
Output current, I , OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA
O
Output peak current, I
, OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA
O(peak)
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating ambient temperature range, T : TL5001C, TL5001AC . . . . . . . . . . . . . . . . . . . . . . –20°C to 85°C
A
TL5001I, TL5001AI . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C
TL5001Q, TL5001AQ . . . . . . . . . . . . . . . . . . . . . –40°C to 125°C
TL5001M, TL5001AM . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
Storage temperature range, T
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
DERATING FACTOR = 70°C
T
≤ 25°C
T
A
T
A
= 85°C
T = 125°C
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING POWER RATING
A
D
FK
JG
P
725 mW
5.8 mW/°C
11.0 mW/°C
8.4 mW/°C
8.0 mW/°C
464 mW
880 mW
672 mW
640 mW
377 mW
715 mW
546 mW
520 mW
145 mW
275 mW
210 mW
200 mW
1375 mW
1050 mW
1000 mW
recommended operating conditions
MIN
3.6
0
MAX
UNIT
V
Supply voltage, V
CC
40
1.5
50
20
45
Amplifier input voltage, V
I(FB)
V
Output voltage, V , OUT
V
O
Output current, I , OUT
O
mA
µA
kΩ
kΩ
kHz
COMP source current
COMP dc load resistance
Oscillator timing resistor, R
100
15
250
500
85
t
Oscillator frequency, f
osc
20
TL5001C, TL5001AC
TL5001I, TL5001AI
TL5001Q, TL5001AQ
TL5001M, TL5001AM
–20
–40
–40
–55
85
Operating ambient temperature, T
°C
A
125
125
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
electrical characteristics over recommended operating free-air temperature range, V
osc
= 6 V,
CC
f
= 100 kHz (unless otherwise noted)
reference
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1.05
12.5
10
MIN TYP
MAX
1.03
12.5
10
Output voltage
Input regulation
COMP connected to FB
0.95
1
2
0.97
1
2
V
V
= 3.6 V to 40 V
mV
CC
T
A
= –20°C to 25°C (C suffix)
= –40°C to 25°C (I suffix)
= 25°C to 85°C
–10
–10
–10
–1
–1
–2
–10
–10
–10
–1
–1
–2
Output voltage change with temperature
T
A
10
10 mV/V
10
T
A
10
†
All typical values are at T = 25°C.
A
undervoltage lockout
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
Upper threshold voltage
Lower threshold voltage
Hysteresis
T
= 25°C
= 25°C
= 25°C
= 25°C
3
3
V
V
A
T
A
2.8
200
2.8
200
T
A
100
2.1
100
2.1
mV
V
Reset threshold voltage
T
A
2.55
2.55
†
All typical values are at T = 25°C.
A
short-circuit protection
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
= 25°C
UNIT
†
†
MIN TYP
MAX
1.05
230
120
–20
MIN TYP
MAX
1.03
230
120
–20
SCP threshold voltage
T
A
0.95
140
1.00
185
60
0.97
140
1.00
185
60
V
SCP voltage, latched
No pullup
No pullup
mV
mV
µA
V
SCP voltage, UVLO standby
Input source current
T
A
= 25°C
–10
–15
1.5
–10
–15
1.5
SCP comparator 1 threshold voltage
†
All typical values are at T = 25°C.
A
oscillator
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
R = 100 kΩ
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
Frequency
100
15
100
15
kHz
kHz
kHz
kHz
kHz
kHz
V
t
Standard deviation of frequency
Frequency change with voltage
V
CC
= 3.6 V to 40 V
1
1
T
= –40°C to 25°C
= –20°C to 25°C
= 25°C to 85°C
–4
–4
–4
–0.4
–0.4
–0.2
1
4
4
4
–4
–4
–4
–0.4
–0.4
–0.2
1
4
4
4
A
Frequency change with temperature
T
A
T
A
Voltage at RT
†
All typical values are at T = 25°C.
A
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
electrical characteristics over recommended operating free-air temperature range, V
osc
= 6 V,
CC
f
= 100 kHz (unless otherwise noted) (continued)
dead-time control
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
†
TYP
MIN
MAX
MIN
MAX
‡
‡
‡
‡
TL5001C
TL5001I
V
V
= 1.5 V
= 1.5 V
0.9 × I
1.1 × I
1.2 × I
0.9 × I
1.1 × I
1.2 × I
(DT)
RT
RT
RT
RT
RT
RT
RT
RT
Output (source) current
Input threshold voltage
µA
0.9 × I
0.9 × I
(DT)
Duty cycle = 0%
0.5
0.7
1.3
0.5
0.7
1.3
V
Duty cycle = 100%
1.5
1.5
†
‡
All typical values are at T = 25°C.
Output source current at RT
A
error amplifier
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1.5
MIN TYP
MAX
Input voltage
V
= 3.6 V to 40 V
0
0
1.5
V
nA
V
CC
Input bias current
–160 –500
2.3
–160 –500
2.3
Positive
1.5
1.5
Output voltage swing
Negative
0.3
80
0.4
0.3
80
0.4
V
Open-loop voltage amplification
Unity-gain bandwidth
dB
MHz
µA
µA
1.5
1.5
Output (sink) current
V
V
= 1.2 V, COMP = 1 V
= 0.8 V, COMP = 1 V
100
–45
600
–70
100
–45
600
–70
I(FB)
Output (source) current
I(FB)
†
All typical values are at T = 25°C.
A
output
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
= 10 mA
UNIT
V
†
†
MIN TYP
MAX
2
MIN TYP
MAX
2
Output saturation voltage
Off-state current
I
1.5
1.5
O
V
V
V
= 50 V,
V
CC
= 0
10
10
O
µA
= 50 V
= 6 V
10
10
O
O
Short-circuit output current
40
40
mA
†
All typical values are at T = 25°C.
A
total device
TL5001C, TL5001I
TL5001AC, TL5001AI
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1.5
MIN TYP
MAX
1.5
Standby supply current
Average supply current
Off state
1
1
mA
mA
R = 100 kΩ
1.4
2.1
1.4
2.1
t
†
All typical values are at T = 25°C.
A
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
electrical characteristics over recommended operating free-air temperature range, V
osc
= 6 V,
CC
f
= 100 kHz (unless otherwise noted)
reference
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1.05
1.07
12.5
MIN TYP
MAX
T
= MIN, 25°C
0.95
0.93
1.00
0.98
2
0.97
0.94
1.00
0.98
2
1.03
1.06
12.5
A
Output voltage
Input regulation
COMP connected to FB
= 3.6 V to 40 V
V
T
A
= MAX
T
A
= MIN to MAX
V
mV
%
CC
Output voltage change with
temperature
T
A
= MIN to MAX
*–6
2
*6
*–6
2
*6
†
All typical values are at T = 25°C.
A
*Not production tested.
undervoltage lockout
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
T
= MIN, 25°C
= MAX
3.00
2.55
2.8
3.00
2.55
2.8
A
Upper threshold voltage
V
T
A
T
A
= MIN, 25°C
= MAX
Lower threshold voltage
Hysteresis
V
mV
V
T
A
2.0
2.0
T
A
= MIN to MAX
100
200
100
200
T
A
= MIN, 25°C
2.10
0.35
2.55
0.63
2.10
0.35
2.55
0.63
Reset threshold voltage
T
A
= MAX
†
All typical values are at T = 25°C.
A
short-circuit protection
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1.05
1.07
230
MIN TYP
MAX
1.03
1.06
230
T
= MIN, 25°C
0.95
0.93
140
1.00
0.98
185
60
0.97
0.94
140
1.00
0.98
185
60
A
SCP threshold voltage
V
T
A
= MAX
SCP voltage, latched
T
= MIN to MAX No pullup
= MIN to MAX No pullup
= MIN to MAX
mV
mV
kΩ
V
A
SCP voltage, UVLO standby
Equivalent timing resistance
SCP comparator 1 threshold voltage
T
A
120
120
T
A
185
1.5
185
1.5
T
A
= MIN to MAX
†
All typical values are at T = 25°C.
A
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
electrical characteristics over recommended operating free-air temperature range, V
osc
= 6 V,
CC
f
= 100 kHz (unless otherwise noted) (continued)
oscillator
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
Frequency
T
= MIN to MAX R = 100 kΩ
100
2
100
2
kHz
kHz
kHz
A
t
Standard deviation of frequency
Frequency change with voltage
T
A
= MIN to MAX
T
A
= MIN to MAX
= MIN to MAX
= MIN to MAX
V
= 3.6 V to 40 V
1
1
CC
Q suffix
M suffix
*–6
*–9
3
*6
*9
*–6
*–9
3
*6
*9
Frequency change with
temperature
T
A
kHz
V
5
5
Voltage at RT
T
A
1
1
†
All typical values are at T = 25°C.
A
*Not production tested.
dead-time control
TL5001Q, TL5001M
TL5001AQ, TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
†
TYP
MIN
MAX
1.1 × I
MIN
MAX
1.1 × I
Output (source)
current
‡
‡
T
A
= MIN to MAX
V
(DT)
= 1.5 V
0.9 × I
0.9 × I
µA
RT
RT
RT
RT
Duty cycle = 0%
Duty cycle = 100%
Duty cycle = 0%
Duty cycle = 100%
0.5
0.7
1.3
0.7
1.3
0.5
0.7
1.3
0.7
1.3
T
= 25°C
A
1.5
1.5
Input threshold
voltage
V
0.4
0.4
T
A
= MIN to MAX
1.7
1.7
†
‡
All typical values are at T = 25°C.
Output source current at RT
A
error amplifier
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
Input bias current
T
= MIN to MAX
–160 –500
2.3
–160 –500
2.3
nA
V
A
Positive
Negative
1.5
1.5
Output voltage
swing
T
A
= MIN to MAX
= MIN to MAX
0.3
80
0.4
0.3
80
0.4
V
Open-loop voltage
amplification
T
A
dB
Unity-gain bandwidth
Output (sink) current
T
= MIN to MAX
= MIN to MAX
= MIN, 25°C
= MAX
1.5
600
–70
–45
1.5
600
–70
–45
MHz
A
T
A
V
V
= 1.2 V, COMP = 1 V
= 0.8 V, COMP = 1 V
100
–45
–30
100
–45
–30
µA
I(FB)
T
A
Output (source) current
µA
I(FB)
T
A
†
All typical values are at T = 25°C.
A
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
electrical characteristics over recommended operating free-air temperature range, V
osc
= 6 V,
CC
f
= 100 kHz (unless otherwise noted) (continued)
output
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
2
MIN TYP
MAX
Output saturation voltage
Off-state current
T
= MIN to MAX
= MIN to MAX
= MIN to MAX
I
= 10 mA
1.5
1.5
2
V
A
O
V
V
V
= 50 V,
= 50 V
= 6 V
V
CC
= 0
10
10
10
O
O
O
T
A
µA
10
Short-circuit output current
T
A
40
40
mA
†
All typical values are at T = 25°C.
A
total device
TL5001Q,
TL5001M
TL5001AQ,
TL5001AM
PARAMETER
TEST CONDITIONS
= MIN to MAX
UNIT
†
†
MIN TYP
MAX
1.5
MIN TYP
MAX
1.5
Standby supply current
Average supply current
Off state
T
1
1
mA
mA
A
T
A
= MIN to MAX R = 100 kΩ
1.4
2.1
1.4
2.1
t
†
All typical values are at T = 25°C.
A
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
PARAMETER MEASUREMENT INFORMATION
2.3 V
COMP
1.5 V
DTC
OSC
PWM/DTC
Comparator
OUT
SCP
Comparator 1
1 V
SCP
SCP Timing Period
0 V
SCP
Comparator 2
3 V
V
CC
NOTE A: The waveforms show timing characteristics for an intermittent short circuit and a longer short circuit that is sufficient to activate SCP.
Figure 4. PWM Timing Diagram
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
TYPICAL CHARACTERISTICS
OSCILLATION FREQUENCY
vs
OSCILLATOR FREQUENCY
vs
AMBIENT TEMPERATURE
TIMING RESISTANCE
100
98
96
94
92
90
88
1 M
V
= 6 V
V
= 6 V
CC
DT Resistance = R
CC
t
R = 100 kΩ
DT Resistance = 100 kΩ
t
T
A
= 25°C
100 k
10 k
10 k
100 k
1 M
– 50
– 25
0
25
50
75
100
R – Timing Resistance – Ω
t
T
A
– Ambient Temperature – °C
Figure 5
Figure 6
REFERENCE OUTPUT VOLTAGE
vs
REFERENCE OUTPUT VOLTAGE FLUCTUATION
vs
POWER-SUPPLY VOLTAGE
AMBIENT TEMPERATURE
2
1.8
1.6
1.4
1.2
1
0.6
T
= 25°C
A
V
= 6 V
CC
FB and COMP
Connected Together
FB and COMP
Connected Together
0.4
0.2
0
– 0.2
0.8
0.6
– 0.4
– 0.6
0.4
0.2
0
– 0.8
0
1
2
3
4
5
6
7
8
9
10
– 50
– 25
0
25
50
75
100
V
CC
– Power-Supply Voltage – V
T
A
– Ambient Temperature – °C
Figure 7
Figure 8
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
TYPICAL CHARACTERISTICS
AVERAGE SUPPLY CURRENT
vs
POWER-SUPPLY VOLTAGE
AVERAGE SUPPLY CURRENT
vs
AMBIENT TEMPERATURE
2
1.5
1
1.3
1.2
1.1
1
R = 100 kΩ
t
V
= 6 V
CC
t
T
= 25 °C
A
R = 100 kΩ
DT Resistance = 100 kΩ
0.9
0.8
0
0.5
0
0
10
20
30
40
– 50
– 25
0
25
50
75
100
V
CC
– Power-Supply Voltage – V
T
A
– Ambient Temperature – °C
Figure 9
Figure 10
ERROR AMPLIFIER OUTPUT VOLTAGE
PWM TRIANGLE WAVE AMPLITUDE VOLTAGE
vs
vs
OUTPUT (SINK) CURRENT
OSCILLATOR FREQUENCY
3
2.5
2
1.8
1.5
1.2
V
V
= 6 V
= 1.2 V
CC
I(FB)
V
T
A
= 6 V
= 25 °C
CC
T
A = 25 °C
V max (100% duty cycle)
osc
1.5
1
0.9
0.6
V min (zero duty cycle)
osc
0.5
0
0.3
0
0
0.2
0.4
0.6
10 k
100 k
1 M
10 M
f
– Oscillator Frequency – Hz
I
O
– Output (Sink) Current – mA
osc
Figure 11
Figure 12
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
TYPICAL CHARACTERISTICS
ERROR AMPLIFIER OUTPUT VOLTAGE
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
vs
AMBIENT TEMPERATURE
OUTPUT (SOURCE) CURRENT
2.46
2.45
2.44
2.43
2.42
2.41
2.40
3
2.5
2
V
= 6 V
= 0.8 V
V
= 6 V
CC
CC
V
V
T
= 0.8 V
I(FB)
No Load
I(FB)
= 25 °C
A
1.5
1
0.5
0
– 50
– 25
0
25
50
75
100
0
20
40
60
80
100
120
T
A
– Ambient Temperature – °C
I
O
– Output (Source) Current – µA
Figure 13
Figure 14
ERROR AMPLIFIER CLOSED-LOOP GAIN AND
ERROR AMPLIFIER OUTPUT VOLTAGE
PHASE SHIFT
vs
vs
AMBIENT TEMPERATURE
OSCILLATOR FREQUENCY
40
30
20
240
–180°
–210°
V
V
= 6 V
= 1.2 V
V
= 6 V
CC
I(FB)
CC
T = 25 °C
A
No Load
220
200
180
160
–240°
–270°
–300°
–330°
–360°
A
V
10
0
φ
140
120
– 10
– 20
10 k
100 k
1 M
10 M
– 50
– 25
T
0
25
50
75
100
– Ambient Temperature – °C
f
– Oscillator Frequency – Hz
A
osc
Figure 15
Figure 16
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
TYPICAL CHARACTERISTICS
OUTPUT DUTY CYCLE
vs
SCP TIME-OUT PERIOD
vs
DTC VOLTAGE
SCP CAPACITANCE
120
100
80
60
40
20
0
12
10
8
V
= 6 V
V
= 6 V
CC
R = 100 kΩ
CC
t
R = 100 kΩ
DT Resistance = 200 kΩ
T
A
t
T
A
= 25 °C
= 25 °C
6
4
2
0
0
0.5
1
1.5
2
0
20
40
60
80
100
120
DTC Voltage – V
C
– SCP Capacitance – nF
SCP
Figure 17
Figure 18
OUTPUT SATURATION VOLTAGE
vs
DTC OUTPUT CURRENT
vs
RT OUTPUT CURRENT
OUTPUT (SINK) CURRENT
2
1.5
1
– 60
– 50
– 40
– 30
– 20
– 10
0
V
T
= 6 V
= 25 °C
DT Voltage = 1.3 V
CC
A
T
= 25 °C
A
0.5
0
0
– 10
I
– 20
– 30
– 40
– 50
– 60
0
5
10
15
20
I
O
– Output (Sink) Current – mA
– RT Output Current – µA
O
Figure 19
Figure 20
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
APPLICATION INFORMATION
V
5 V
I
R1
470 Ω
+
C1
100 µF
10 V
Q1
TPS1101
GND
L1
20 µH
3.3 V
GND
C3
0.1 µF
CR1
MBRS140T3
+
C2
2
100 µF
V
C4
1 µF
CC
10 V
1
5
SCP
V
O
+
C5
0.1 µF
3
4
COMP
U1
TL5001/A
R7
2.0 kΩ
R5
7.50 kΩ
1%
C6
0.012 µF
R2
56 kΩ
6
7
C7
0.0047 µF
DTC
R4
5.1 kΩ
R3
43 kΩ
FB
RT
R6
3.24 kΩ
1%
GND
8
Partial Bill of Materials:
U1
Q1
LI
TL5001/A
TPS1101
CTX20-1 or
Texas Instruments
Texas Instruments
Coiltronics
23 turns of #28 wire on
Micrometals No. T50-26B core
TPSD107M010R0100
TPSD107M010R0100
MBRS140T3
C1
C2
CR1
AVX
AVX
Motorola
NOTES: A. Frequency = 200 kHz
B. Duty cycle = 90% max
C. Soft-start time constant (TC) = 5.6 ms
D. SCP TC = 70 msA
Figure 21. Step-Down Converter
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
MECHANICAL DATA
D (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
0.050 (1,27)
0.020 (0,51)
0.010 (0,25)
M
0.014 (0,35)
14
8
0.008 (0,20) NOM
0.244 (6,20)
0.228 (5,80)
0.157 (4,00)
0.150 (3,81)
Gage Plane
0.010 (0,25)
1
7
0°–8°
0.044 (1,12)
A
0.016 (0,40)
Seating Plane
0.004 (0,10)
0.010 (0,25)
0.004 (0,10)
0.069 (1,75) MAX
PINS **
8
14
16
DIM
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
A MAX
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
A MIN
4040047/D 10/96
NOTES: B. All linear dimensions are in inches (millimeters).
C. This drawing is subject to change without notice.
D. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
E. Falls within JEDEC MS-012
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
MECHANICAL DATA
FK (S-CQCC-N**)
LEADLESS CERAMIC CHIP CARRIER
28 TERMINALS SHOWN
A
B
NO. OF
TERMINALS
**
18 17 16 15 14 13 12
MIN
MAX
MIN
MAX
0.342
(8,69)
0.358
(9,09)
0.307
(7,80)
0.358
(9,09)
19
20
11
10
9
20
28
44
52
68
84
0.442
(11,23)
0.458
(11,63)
0.406
(10,31)
0.458
(11,63)
21
B SQ
22
0.640
(16,26)
0.660
(16,76)
0.495
(12,58)
0.560
(14,22)
8
A SQ
23
0.740
(18,78)
0.761
(19,32)
0.495
(12,58)
0.560
(14,22)
7
24
25
6
0.938
(23,83)
0.962
(24,43)
0.850
(21,6)
0.858
(21,8)
5
1.141
(28,99)
1.165
(29,59)
1.047
(26,6)
1.063
(27,0)
26 27 28
1
2
3
4
0.080 (2,03)
0.064 (1,63)
0.020 (0,51)
0.010 (0,25)
0.020 (0,51)
0.010 (0,25)
0.055 (1,40)
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
4040140/C 11/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold-plated.
E. Falls within JEDEC MS-004
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MCER001A – JANUARY 1995 – REVISED JANUARY 1997
JG (R-GDIP-T8)
MECHANICAL DATA
CERAMIC DUAL-IN-LINE
0.400 (10,16)
0.355 (9,00)
8
5
0.280 (7,11)
0.245 (6,22)
1
4
0.065 (1,65)
0.045 (1,14)
0.310 (7,87)
0.290 (7,37)
0.063 (1,60)
0.015 (0,38)
0.020 (0,51) MIN
0.200 (5,08) MAX
Seating Plane
0.130 (3,30) MIN
0.023 (0,58)
0.015 (0,38)
0°–15°
0.100 (2,54)
0.014 (0,36)
0.008 (0,20)
4040107/C 08/96
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification.
E. Falls within MIL STD 1835 GDIP1-T8
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MCER001A – JANUARY 1995 – REVISED JANUARY 1997
MECHANICAL INFORMATION
P (R-PDIP-T8)
PLASTIC DUAL-IN-LINE PACKAGE
0.400 (10,60)
0.355 (9,02)
8
5
0.260 (6,60)
0.240 (6,10)
1
4
0.070 (1,78) MAX
0.310 (7,87)
0.290 (7,37)
0.020 (0,51) MIN
0.200 (5,08) MAX
Seating Plane
0.125 (3,18) MIN
0.100 (2,54)
0°–15°
0.021 (0,53)
0.015 (0,38)
0.010 (0,25)
M
0.010 (0,25) NOM
4040082/B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
22
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