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PDF CS51024A Data sheet ( Hoja de datos )
| Número de pieza | CS51024A | |
| Descripción | (CS51021A - CS51024A) Enhanced Current Mode PWM Controller | |
| Fabricantes | ON Semiconductor | |
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CS51021A, CS51022A,
CS51023A, CS51024A
Enhanced Current Mode
PWM Controller
The CS51021A/2A/3A/4A Fixed Frequency PWM Current Mode
Controller family provides all necessary features required for AC−DC
or DC−DC primary side control. Several features are included
eliminating the additional components needed to implement them
externally. In addition to low startup current (75 mA) and high
frequency operation capability, the CS51021A/2A/3A/4A family
includes overvoltage and undervoltage monitoring, externally
programmable dual threshold overcurrent protection, current sense
leading edge blanking, current slope compensation, accurate duty cycle
control and an externally available 5.0 V reference. The CS51021A
and CS51023A feature bidirectional synchronization capability, while
the CS51022A and CS51024A offer a sleep mode with 100 mA
maximum IC current consumption. The CS51021A/2A/3A/4A family
is available in a 16 lead narrow body SOIC package.
Device
CS51021A
CS51022A
CS51023A
CS51024A
Sleep/Synch
Synch
Sleep
Synch
Sleep
VCC Start/Stop
8.25 V/7.7 V
8.25 V/7.7 V
13 V/7.7 V
13 V/7.7 V
Features
• 75 mA Max. Startup Current
• Fixed Frequency Current Mode Control
• 1.0 MHz Switching Frequency
• Undervoltage Protection Monitor
• Overvoltage Protection Monitor with Programmable Hysteresis
• Programmable Dual Threshold Overcurrent Protection with
Delayed Restart
• Programmable Soft Start
• Accurate Maximum Duty Cycle Limit
• Programmable Slope Compensation
• Leading Edge Current Sense Blanking
• 1.0 A Sink/Source Gate Drive
• Bidirectional Synchronization (CS51021A/3A)
• 50 ns PWM Propagation Delay
• 100 mA Max Sleep Current (CS51022A/4A)
• Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
February, 2006 − Rev. 8
1
http://onsemi.com
16
1
SOIC−16
D SUFFIX
CASE 751B
16
1
TSSOP−16
DTB SUFFIX
CASE 948F
PIN CONNECTIONS AND
MARKING DIAGRAMS
1
GATE
ISENSE
SLEEP or SYNC
SLOPE
UV
OV
RTCT
ISET
16
VC
PGND
VCC
VREF
LGND
SS
COMP
VFB
1 16
x = Specific Device Code
A = Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
G or G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
Publication Order Number:
CS51021A/D
1 page  
CS51021A, CS51022A, CS51023A, CS51024A
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, specifications apply for −40°C < TA < 85°C, −40°C < TJ < 150°C,
3.0 V < VC < 20 V, 8.2 V < VCC < 20 V, RT = 12 kW, CT = 390 pF)
Characteristic
Test Conditions
Min Typ
Max Unit
Current Sense
OFFSET Voltage
(Note 4)
0.09 0.10
0.11 V
Blanking Time
− − 55 160 ns
Blanking Disable Voltage
Second Current Threshold Gain
Adjust VFB
−
1.8 2.0
1.21 1.33
2.2 V
1.45 V/V
ISENSE Input Resistance
Minimum On Time
GATE High to Low
−
− 5.0
− kW
30 70 110 ns
Gain
(Note 4)
0.78 0.80
0.82 V/V
OV & UV Voltage Monitors
OV Monitor Threshold
−
2.4 2.5
2.6 V
OV Hysteresis Current
−
−10 −12.5
−15 mA
UV Monitor Threshold
−
1.38 1.45
1.52 V
UV Monitor Hysteresis
− 25 75 100 mV
SOFT START (SS)
Charge Current
SS = 2.0 V
−70 −55
−40 mA
Discharge Current
SS = 2.0 V
250 1000
− mA
Charge Voltage, VSS
Discharge Voltage, VSS
4. Guaranteed by design, not 100% tested in production.
−
−
4.4 4.7
0.25 0.27
5.0 V
0.30 V
PACKAGE PIN DESCRIPTION
PIN #
PIN SYMBOL
FUNCTION
16 Lead SO Narrow
1
GATE
External power switch driver with 1.0 A peak capability.
2
ISENSE
Current sense amplifier input.
3 SYNC (CS51021A/3A) Bi−directional synchronization. Locks to the highest frequency.
3 SLEEP (CS51022A/4A) Active high chip disable. In sleep mode, VREF and GATE are turned off.
4
SLOPE
Additional slope to the current sense signal. Internal current source charges the external capacitor.
5 UV Undervoltage protection monitor.
6 OV Overvoltage protection monitor.
7
RTCT
Timing resistor RT and capacitor CT determine oscillator frequency and maximum duty cycle, DMAX.
8 ISET Voltage at this pin sets pulse−by−pulse overcurrent threshold, and second threshold (1.33 times
higher) with Soft Start retrigger (hiccup mode).
9 VFB Feedback voltage input. Connected to the error amplifier inverting input.
10
COMP
Error amplifier output. Frequency compensation network is usually connected between COMP and
VFB pins.
Charging external capacitor restricts error amplifier output voltage during the start or fault
11 SS conditions (hiccup).
12
LGND
Logic ground.
13
VREF
5.0 V reference voltage output.
14 VCC Logic supply voltage.
15
PGND
Output power stage ground connection.
16 VC Output power stage supply voltage.
http://onsemi.com
5
5 Page 
CS51021A, CS51022A, CS51023A, CS51024A
TSSOP−16
CASE 948F−01
ISSUE A
0.15 (0.006) T U S
16X K REF
0.10 (0.004) M T U S V S
16
2X L/2
L
PIN 1
IDENT.
1
9
B
−U−
8
0.15 (0.006) T U S
A
−V−
K
K1
ÇÉÇÉÇJ1
ÇÇÉÇÇÉÇÇSECTION N−N
J
N
0.25 (0.010)
M
N
F
DETAIL E
0.10 (0.004)
−T− SEATING
PLANE
D
C
H DETAIL E
G
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD
FLASH. PROTRUSIONS OR GATE BURRS.
MOLD FLASH OR GATE BURRS SHALL NOT
EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL
NOT EXCEED 0.25 (0.010) PER SIDE.
5. DIMENSION K DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08
(0.003) TOTAL IN EXCESS OF THE K
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE −W−.
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
A 4.90 5.10 0.193 0.200
B 4.30 4.50 0.169 0.177
C −−− 1.20 −−− 0.047
D 0.05 0.15 0.002 0.006
F 0.50 0.75 0.020 0.030
G 0.65 BSC
0.026 BSC
H 0.18 0.28 0.007 0.011
J 0.09 0.20 0.004 0.008
J1 0.09 0.16 0.004 0.006
K 0.19 0.30 0.007 0.012
K1 0.19 0.25 0.007 0.010
L 6.40 BSC
0.252 BSC
M 0_ 8_ 0_ 8_
−W−
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 61312, Phoenix, Arizona 85082−1312 USA
Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada
Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Japan: ON Semiconductor, Japan Customer Focus Center
2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051
Phone: 81−3−5773−3850
http://onsemi.com
11
ON Semiconductor Website: http://onsemi.com
Order Literature: http://www.onsemi.com/litorder
For additional information, please contact your
local Sales Representative.
CS51021/D
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CS51024A.PDF ] | |
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