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MC33129のメーカーはMotorola Semiconductorsです、この部品の機能は「(MC33129 / MC34129) High Performance Current Mode Controller」です。 |
部品番号 | MC33129 |
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部品説明 | (MC33129 / MC34129) High Performance Current Mode Controller | ||
メーカ | Motorola Semiconductors | ||
ロゴ | |||
このページの下部にプレビューとMC33129ダウンロード(pdfファイル)リンクがあります。 Total 16 pages
Order this document by MC34129/D
High Performance
Current Mode Controllers
The MC34129/MC33129 are high performance current mode switching
regulators specifically designed for use in low power digital telephone
applications. These integrated circuits feature a unique internal fault timer
that provides automatic restart for overload recovery. For enhanced system
efficiency, a start/run comparator is included to implement bootstrapped
operation of VCC. Other functions contained are a temperature compensated
reference, reference amplifier, fully accessible error amplifier, sawtooth
oscillator with sync input, pulse width modulator comparator, and a high
current totem pole driver ideally suited for driving a power MOSFET.
Also included are protective features consisting of soft–start,
undervoltage lockout, cycle–by–cycle current limiting, adjustable deadtime,
and a latch for single pulse metering.
Although these devices are primarily intended for use in digital telephone
systems, they can be used cost effectively in many other applications.
• Current Mode Operation to 300 kHz
• Automatic Feed Forward Compensation
• Latching PWM for Cycle–by–Cycle Current Limiting
• Continuous Retry after Fault Timeout
• Soft–Start with Maximum Peak Switch Current Clamp
• Internally Trimmed 2% Bandgap Reference
• High Current Totem Pole Driver
• Input Undervoltage Lockout
• Low Startup and Operating Current
• Direct Interface with Motorola SENSEFET Products
MC34129www.DataSheet4U.com
MC33129
HIGH PERFORMANCE
CURRENT MODE
CONTROLLERS
SEMICONDUCTOR
TECHNICAL DATA
14
1
P SUFFIX
PLASTIC PACKAGE
CASE 646
14
1
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
PIN CONNECTIONS
CSoft–Start 12
7
Gnd
6
Vref 2.5V
5
RT/CT
Sync/Inhibit 4
Input
Simplified Block Diagram
Soft–Start
and
Fault Timer
Start/Run
13 Start/Run
Output
Undervoltage 14
Lockout
VCC
1.25V
Reference
8
Vref 1.25V
X2
Oscillator
Latching
PWM
Error Amp
9
+
–
10
Noninverting
Input
Inverting
11
Input
Feedback/
1 PWM Input
Drive Out
2
Drive Gnd
3
Ramp Input
Drive Output 1
Drive Ground 2
Ramp Input 3
Sync/Inhibit
Input
4
RT/CT 5
Vref 2.5 V 6
Gnd 7
14 VCC
13 Start/Run Output
12 CSoft–Start
Feedback/
11 PWM Input
10
Error Amp
Inverting Input
9 Error Amp
Noninverting Input
8 Vref 1.25 V
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34129D
MC34129P
TA = 0° to +70°C
SO–14
Plastic DIP
MC33129D
TA = – 40° to +85°C
MC33129P
SO–14
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1
1 Page MC34129 MC33129
ELECTRICAL CHARACTERISTICS (VCC = 10 V, TA = 25°C [Note 1], unless otherwise noted.)
Characteristics
Symbol
Min
PWM COMPARATOR
Input Offset Voltage (Vin = 1.25 V)
Input Bias Current
Propagation Delay, Ramp Input to Drive Output
VIO
IIB
tPLH(IN/DRV)
150
–
–
SOFT–START
Capacitor Charge Current (Pin 12 = 0 V)
Buffer Input Offset Voltage (Vin = 1.25 V)
Buffer Output Voltage (ISink = 100 µA)
Ichg
VIO
VOL
0.75
–
–
FAULT TIMER
Restart Delay Time
tDLY
200
START/RUN COMPARATOR
Threshold Voltage (Pin 12)
Vth –
Threshold Hysteresis Voltage (Pin 12)
Output Voltage (ISink = 500 µA)
Output Off–State Leakage Current (VOH = 15 V)
Output Zener Voltage (IZ = 10 mA)
VH
VOL
IS/R(leak)
VZ
–
9.0
–
–
OSCILLATOR
Frequency (RT = 25.5 kΩ, CT = 390 pF)
Capacitor CT Discharge Current (Pin 5 = 1.2 V)
Sync Input Current
High State (Vin = 2.0 V)
Low State (Vin = 0.8 V)
fOSC
Idischg
IIH
IIL
80
240
–
–
Sync Input Resistance
Rin 12.5
DRIVE OUTPUT
Output Voltage
High State (ISource = 200 mA)
Low State (ISource = 200 mA)
VOH
VOL
8.3
–
Low State Holding Current
IH –
Output Voltage Rise Time (CL = 500 pF)
Output Voltage Fall Time (CL = 500 pF)
Output Pull–Down Resistance
tr
tf
RPD
–
–
100
UNDERVOLTAGE LOCKOUT
Startup Threshold
Vth 3.0
Hysteresis
VH 5.0
TOTAL DEVICE
Power Supply Current
RT = 25.5 kΩ, CT = 390 pF, CL = 500 pF
ICC 1.0
Power Supply Zener Voltage (IZ = 10 mA)
VZ 12
NOTE: 1. Tlow = 0°C for MC34129
–40°C for MC33129
Thigh = +70°C for MC34129
+85°C for MC33129
Tywp ww.DataMSahxeet4U.Ucnoimt
275
–120
250
400
–250
–
mV
µA
ns
1.2 1.50 µA
15 40 mV
0.15
0.225
V
400 600 µs
2.0
350
10
0.4
(VCC + 7.6)
–
–
10.3
2.0
–
V
mV
V
µA
V
100 120 kHz
350 460 µA
µA
40 125
15 35
32 50 kΩ
V
8.9 –
1.4 1.8
225 – µA
390 – ns
30 – ns
225 350 kΩ
3.6 4.2 V
10 15 %
2.5 4.0 mA
14.3 – V
MOTOROLA ANALOG IC DEVICE DATA
3
3Pages MC34129 MC33129
Figure 13. 1.25 V Reference Output Voltage
versus Temperature
0 *Vref = 1.225 V
*Vref = 1.250 V
*Vref = 1.275 V
–2.0
–4.0
–6.0
–8.0
–10
–55
VCC = 10 V
RL = ∞
*Vref at TA = 25°C
–25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100
125
Figure 14. 2.5 V ReferenwcwewO.DuatptauSthVeoeltt4aUg.ceom
versus Temperature
0 *Vref = 2.375 V
*Vref = 2.500 V
*Vref = 2.625 V
4.0
8.0
–12
–16
–20
–55
VCC = 10 V
RL = 2.5 k
*Vref at TA = 25°C
–25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100
125
Figure 15. Drive Output Saturation
versus Load Current
0
VCC
–1.0
VCC = 10 V
TA = 25°C
–2.0 Source Saturation
(Load to Ground)
–3.0
Figure 16. Drive Output Waveform
10 RL = R
CL = 500 pF
TA = 25°C
3.0 Sink Saturation
(Load to VCC)
2.0
1.0 0
Gnd
0
0 200 400 600 800
IO, OUTPUT LOAD CURRENT (mA)
1.0 µs/DIV
Figure 17. Supply Current versus Supply Voltage
10
RT = 25.5 k
8.0
CT = 390 pF
TA = 25°C
6.0
4.0
CL = 500 pF
2.0
CL = 15 pF
0
0 4.0 8.0 12 16
VCC, SUPPLY VOLTAGE (V)
6 MOTOROLA ANALOG IC DEVICE DATA
6 Page | |||
ページ | 合計 : 16 ページ | ||
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MC33129 | (MC33129 / MC34129) High Performance Current Mode Controller | Motorola Semiconductors |