TL5001AQDRQ1 [TI]
PULSE-WIDTH-MODULATION CONTROL CIRCUITS; 脉宽调制控制电路型号: | TL5001AQDRQ1 |
厂家: | TEXAS INSTRUMENTS |
描述: | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
文件: | 总17页 (文件大小:231K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
1
FEATURES
D PACKAGE
(TOP VIEW)
•
•
•
•
•
•
•
Qualified for Automotive Applications
Complete PWM Power Control
OUT
GND
RT
DTC
SCP
1
2
3
4
8
7
6
5
3.6-V to 40-V Operation
V
CC
Internal Undervoltage-Lockout Circuit
Internal Short-Circuit Protection
Oscillator Frequency: 20 kHz to 500 kHz
COMP
FB
Variable Dead Time Provides Control Over
Total Range
•
•
±3% Tolerance on Reference Voltage
Available in Q-Temperature Automotive
–
–
–
High-Reliability Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards
DESCRIPTION
The TL5001A incorporates on a single monolithic chip all the functions required for a pulse-width-modulation
(PWM) control circuit. Designed primarily for power-supply control, the TL5001A contains an error amplifier, a
regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO),
short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical reference
voltage tolerance of ±3%.
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 VCC conditions, the UVLO circuit turns the output off until VCC recovers to its
normal operating range.
The TL5001A is characterized for operation from –40°C to 125°C.
AVAILABLE OPTIONS(1)
PACKAGED DEVICES(2)
TA
SMALL OUTLINE
(D)(3)
–40°C to 125°C
TL5001AQDRQ1
(1) For the most current package and ordering information, see the
Package Option Addendum at the end of this document, or see the
TI web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at
www.ti.com/packaging.
(3) The D package is available taped and reeled. Add the suffix R to the
device type (e.g., TL5001ADR).
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2009, Texas Instruments Incorporated
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
SCHEMATIC FOR TYPICAL APPLICATION
V
I
+
TPS1101
V
O
+
2
V
CC
1
3
5
SCP
V
O
COMP
TL5001A
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
Reference
Voltage
1.5 V
OSC
PWM/DTC
Comparator
Error
Amplifier
SCP
Comparator 1
+
−
4
3
FB
COMP
SCP
Comparator 2
5
SCP
8
GND
2
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
DETAILED DESCRIPTION
VOLTAGE REFERENCE
A 2.5-V regulator operating from VCC is used to power the internal circuitry of the TL5001A and 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:
VO = (1 + R1/R2) (1 V)
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 (fosc) can be set between 20 kHz and 500 kHz by connecting a resistor between RT 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 (IDT) at DTC that is nominally equal
to the current at the oscillator timing terminal (RT). Connecting a resistor between DTC and GND generates a
dead-time reference voltage (VDT), which the PWM/DTC comparator compares to the oscillator triangle wave as
described in the previous section. Nominally, the maximum duty cycle is 0% when VDT is 0.7 V or less and
100% when VDT is 1.3 V or greater. Because the triangle wave amplitude is a function of frequency and the
source impedance of RT is relatively high (1250 Ω), choosing RDT for a specific maximum duty cycle (D) is
accomplished using the following equation and the voltage limits for the frequency in question as found in
Figure 11 (Voscmax and Voscmin are the maximum and minimum oscillator levels):
(
) [ (
)
]
RDT + Rt ) 1250 D Vosc max * Vosc min ) Vosc min
; VRT + 1 V
VRT
(1)
Where
RDT and Rt are in Ω, D is in decimal
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
Soft start can be implemented by paralleling the DTC resistor with a capacitor (CDT) as shown in Figure 2. During
soft start, the voltaǒge at DTC is derived by the following equation:
DTǓ
t
VDT [ IDTRDT 1 * e*
R
C
DT
(2)
6
DTC
TL5001/A
C
DT
R
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 (RDTCDT) should
be t0/3 to t0/5. The TL5001A remains off until VDT ≈ 0.7 V, the minimum ramp value. CDT is discharged 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 TL5001A 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.
2.5 V
R
SCP
185 kΩ
12 kΩ
SCP
Comparator 2
C
SCP
SCP
To Output
Drive Logic
5
From Error
Amp
Q1
V
ref
= 1 V
SCP
1.5 V
Comparator 1
Q2
Figure 3. SCP Circuit
4
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
The timer operates by charging an external capacitor (CSCP) connected between the SCP terminal and ground,
towards 2.5 V through a 185-kΩ resistor (RSCP). The circuit begins charging from an initial voltage of
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 Equation 3:
VSCP = (2.5 – 0.185) (1 – e–t/τ) + 0.185
(3)
Where
τ = RSCPCSCP
The end of the time-out period (tSCP) occurs when VSCP = 1 V. Solving for CSCP yields Equation 4:
CSCP = 12.46 × tSCP
(4)
Where
t is in seconds, C is in µF
tSCP must be much longer (generally 10 to 15 times) than the converter start-up period, or the converter will not
start.
OUTPUT TRANSISTOR
The output of the TL5001A 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.
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
5
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
VCC
VI(FB)
VO
Supply voltage(2)
41 V
20 V
Amplifier input voltage
Output voltage, OUT
51 V
IO
Output current, OUT
21 mA
IO(peak)
Output peak current, OUT
100 mA
Continuous total power dissipation
Operating ambient temperature range, TL5001AQDRQ1
Storage temperature range
See Dissipation Rating
–40°C to 125°C
–65°C to 150°C
260°C
TA
Tstg
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
(1) 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.
(2) All voltage values are with respect to network ground terminal.
DISSIPATION RATINGS
PACKAGE
T
A ≤ 25°C
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
TA = 125°C
POWER RATING
POWER RATING
D
725 mW
5.8 mW/°C
464 mW
377 mW
145 mW
RECOMMENDED OPERATING CONDITIONS
MIN
MAX
40
UNIT
V
VCC
VI(FB)
VO
Supply voltage
3.6
0
Amplifier input voltage
Output voltage, OUT
Output current, OUT
COMP source current
COMP dc load resistance
Oscillator timing resistor
Oscillator frequency
1.5
50
V
V
IO
20
mA
µA
kΩ
kΩ
kHz
°C
45
100
15
Rt
250
500
125
fOSC
TA
20
Operating ambient temperature
TL5001AQDRQ1
–40
6
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted)
TL5001AQ
MIN TYP(1)
PARAMETER
TEST CONDITIONS
UNIT
MAX
REFERENCE
Output voltage
Input regulation
TA = 25°C
0.97
0.94
1
0.98
2
1.03
1.06
12.5
COMP connected to FB
VCC = 3.6 V to 40 V
V
TA = MIN to MAX
TA = MIN to MAX,
TA = MIN to MAX
mV
Output voltage change with temperature
–6%(2)
2% 6%(2)
UNDERVOLTAGE LOCKOUT
TA = MIN, 25°C
TA = MAX
3
2.55
Upper threshold voltage
V
TA = MIN, 25°C
TA = MAX
2.8
2.0
Lower threshold voltage
Hysteresis
V
mV
V
TA = MIN to MAX
TA = MIN, 25°C
TA = MAX
80
2.1
200
2.55
0.63
Reset threshold voltage
SHORT-CIRCUIT PROTECTION
SCP threshold voltage
0.35
TA = MIN, 25°C
TA = MAX
0.97
0.94
140
1
0.98
185
60
1.03
1.06
230
120
V
SCP voltage, latched
TA = MIN to MAX
TA = MIN to MAX
TA = MIN to MAX
TA = MIN to MAX
No pullup
No pullup
mV
mV
kΩ
V
SCP voltage, UVLO standby
Equivalent timing resistance
SCP comparator 1 threshold voltage
OSCILLATOR
185
1.5
Frequency
TA = MIN to MAX
TA = MIN to MAX
TA = MIN to MAX
Rt = 100 kΩ
100
2
kHz
kHz
kHz
Standard deviation of frequency
Frequency change with voltage
VCC = 3.6 V to 40 V
Q suffix
1
–9(2)
–9(2)
5
9(2)
9(2)
Frequency change with temperature
TA = MIN to MAX
TA = MIN to MAX
kHz
V
M suffix
5
Voltage at RT
1
DEAD-TIME CONTROL
TA = MIN to MAX
V(DT) = 1.5 V
0.9 ×
IRT
1.1 ×
IRT
Output (source) current
Input threshold voltage
µA
(3)
(3)
Duty cycle 0%
Duty cycle 100%
Duty cycle 0%
Duty cycle 100%
0.5
0.4
0.7
1.3
0.7
1.3
TA = 25°C
1.5
1.7
V
TA = MIN to MAX
(1) All typical values are at TA = 25°C.
(2) Not production tested.
(3) Output source current at RT
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
7
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted)
TL5001AQ
PARAMETER
ERROR AMPLIFIER
TEST CONDITIONS
UNIT
MIN
TYP(1)
MAX
–500
0.4
Input bias current
TA = MIN to MAX
TA = MIN to MAX
–160
2.3
nA
V
Positive
1.5
Output voltage swing
Negative
0.3
V
Open-loop voltage amplification
Unity gain bandwidth
TA = MIN to MAX
TA = MIN to MAX
TA = MIN to MAX
TA = MIN, 25°C
TA = MAX
80
dB
MHz
µA
1.5
Output (sink) current
VI(FB) = 1.2 V, COMP = 1 V
100
–45
–30
600
–70
–45
Output (source) current
VI(FB) = 0 V, COMP = 1 V
µA
OUTPUT
Output saturation voltage
TA = MIN to MAX
TA = MIN to MAX
IO = 10 mA
1.5
40
2
10
10
V
VO = 50 V, VCC = 0
VO = 50 V
Off-state current
µA
mA
Short-circuit output current
TA = MIN to MAX
VO = 6 V
TOTAL DEVICE
Standby supply current
Average supply current
Off state
TA = MIN to MAX
TA = MIN to MAX
1
1.5
2.1
mA
mA
RL = 100 kΩ
1.4
(1) All typical values are at TA = 25°C.
8
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
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
SCP
Comparator 2
0 V
3 V
V
CC
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
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS
OSCILLATOR FREQUENCY
vs
OSCILLATION FREQUENCY
vs
AMBIENT TEMPERATURE
TIMING RESISTANCE
1 M
100
98
96
94
92
90
88
V
= 6 V
CC
V
= 6 V
CC
DT Resistance = R
T = 25°C
A
t
R = 100 kΩ
DT Resistance = 100 kΩ
t
100 k
10 k
10 k
100 k
1 M
− 50
− 25
0
25
50
75
100
R − Timing Resistance − Ω
t
T − Ambient Temperature − °C
A
Figure 5.
Figure 6.
REFERENCE OUTPUT VOLTAGE
vs
POWER-SUPPLY VOLTAGE
REFERENCE OUTPUT VOLTAGE FLUCTUATION
vs
AMBIENT TEMPERATURE
2
1.8
1.6
1.4
1.2
1
0.6
T = 25°C
FB and COMP
Connected Together
A
V
= 6 V
CC
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 − Ambient Temperature − °C
A
Figure 7.
Figure 8.
10
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
AVERAGE SUPPLY CURRENT
vs
POWER-SUPPLY VOLTAGE
AVERAGE SUPPLY CURRENT
vs
AMBIENT TEMPERATURE
1.3
1.2
1.1
1
2
1.5
1
R = 100 kΩ
V
= 6 V
t
CC
T
= 25 °C
R = 100 kΩ
DT Resistance = 100 kΩ
A
t
0.9
0.8
0
0.5
0
− 50
− 25
0
25
50
75
100
0
10
20
30
40
T
A
− Ambient Temperature − °C
V
CC
− Power-Supply Voltage − V
Figure 9.
Figure 10.
PWM TRIANGLE WAVE AMPLITUDE VOLTAGE
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
vs
OSCILLATOR FREQUENCY
OUTPUT (SINK) CURRENT
3
2.5
2
1.8
1.5
1.2
V
V
T
= 6 V
= 1.2 V
V
T
A
= 6 V
= 25 °C
CC
I(FB)
CC
°
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
10 k
100 k
1 M
10 M
0
0.2
0.4
0.6
f
− Oscillator Frequency − Hz
osc
I
O
− Output (Sink) Current − mA
Figure 11.
Figure 12.
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
ERROR AMPLIFIER OUTPUT VOLTAGE
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
vs
OUTPUT (SOURCE) CURRENT
AMBIENT TEMPERATURE
3
2.5
2
2.46
2.45
2.44
2.43
2.42
2.41
2.40
V
V
T
A
= 6 V
= 0.8 V
= 25 °C
CC
I(FB)
V
V
= 6 V
CC
= 0.8 V
I(FB)
No Load
1.5
1
0.5
0
0
20
40
60
80
100
120
− 50
− 25
0
25
50
75
100
I
O
− Output (Source) Current − µA
T − Ambient Temperature − °C
A
Figure 13.
Figure 14.
ERROR AMPLIFIER OPEN-LOOP GAIN
ERROR AMPLIFIER OUTPUT VOLTAGE
AND PHASE SHIFT
vs
vs
AMBIENT TEMPERATURE
FREQUENCY
240
40
−180°
V
= 6 V
= 1.2 V
V
T
= 6 V
= 25 °C
CC
CC
V
I(FB)
A
No Load
220
200
180
160
30
20
−210°
−240°
−270°
−300°
−330°
−360°
A
V
10
0
φ
140
120
− 10
− 20
− 50
− 25
0
25
50
75
100
10 k
100 k
1 M
10 M
T − Ambient Temperature − °C
A
f − Frequency − Hz
Figure 15.
Figure 16.
12
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
OUTPUT DUTY CYCLE
vs
SCP TIME-OUT PERIOD
vs
SCP CAPACITANCE
DTC VOLTAGE
120
100
80
60
40
20
0
12
10
8
V
= 6 V
V
= 6 V
CC
CC
R = 100 kΩ
T = 25 °C
A
R = 100 kΩ
DT Resistance = 200 kΩ
T
A
t
t
= 25 °C
6
4
2
0
0
0.5
1
1.5
2
0
20
C
40
60
80
100
120
DTC Voltage − V
− SCP Capacitance − nF
SCP
Figure 17.
Figure 18.
DTC OUTPUT CURRENT
vs
RT OUTPUT CURRENT
OUTPUT SATURATION VOLTAGE
vs
OUTPUT (SINK) CURRENT
2
− 60
− 50
− 40
− 30
− 20
− 10
0
DT Voltage = 1.3 V
V
T
= 6 V
= 25 °C
CC
T
A
= 25 °C
A
1.5
1
0.5
0
0
− 10
− 20
− 30
− 40
− 50
− 60
0
5
10
15
20
I
O
− Output (Sink) Current − mA
I
O
− RT Output Current − µA
Figure 19.
Figure 20.
Copyright © 2005–2009, Texas Instruments Incorporated
Submit Documentation Feedback
13
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
SLVS603B–AUGUST 2005–REVISED FEBRUARY 2009.............................................................................................................................................. www.ti.com
APPLICATION INFORMATION
V
I
5 V
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
R7
2.0 kΩ
R5
7.50 kΩ
1%
U1
C6
0.012 µF
R2
56 kΩ
TL5001A
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
TL5001A
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
A. Frequency = 200 kHz
B. Duty cycle = 90% max
C. Soft-start time constant (TC) = 5.6 ms
D. SCP TC = 70 ms
Figure 21. Step Down Converter
14
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
PACKAGE OPTION ADDENDUM
www.ti.com
26-Mar-2010
PACKAGING INFORMATION
Orderable Device
TL5001AQDRG4Q1
TL5001AQDRQ1
Status (1)
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SOIC
D
8
2500 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SOIC
D
8
2500 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TL5001A-Q1 :
Catalog: TL5001A
Military: TL5001AM
•
•
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
Military - QML certified for Military and Defense Applications
•
•
Addendum-Page 1
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Audio
www.ti.com/audio
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
Communications and Telecom www.ti.com/communications
Amplifiers
Data Converters
DLP® Products
DSP
Computers and Peripherals
Consumer Electronics
Energy and Lighting
Industrial
www.ti.com/computers
www.ti.com/consumer-apps
www.ti.com/energy
dsp.ti.com
www.ti.com/industrial
www.ti.com/medical
www.ti.com/security
Clocks and Timers
Interface
www.ti.com/clocks
interface.ti.com
logic.ti.com
Medical
Security
Logic
Space, Avionics and Defense www.ti.com/space-avionics-defense
Power Mgmt
power.ti.com
Transportation and
Automotive
www.ti.com/automotive
Microcontrollers
RFID
microcontroller.ti.com
www.ti-rfid.com
Video and Imaging
Wireless
www.ti.com/video
www.ti.com/wireless-apps
RF/IF and ZigBee® Solutions www.ti.com/lprf
TI E2E Community Home Page
e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2011, Texas Instruments Incorporated
相关型号:
©2020 ICPDF网 联系我们和版权申明