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參數資料
| 型號： | MAX8521 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Triple 3-Input Positive-NAND Gates 20-LCCC -55 to 125 |
| 中文描述： | 尺寸最小的TEC電源驅動器，用于光模塊 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 605K |
| 代理商： | MAX8521 |
General Description
The MAX8520/MAX8521 are designed to drive thermo-
electric coolers (TECs) in space-constrained optical
modules. Both devices deliver ±1.5A output current
and control the TEC current to eliminate harmful current
surges. On-chip FETs minimize external components and
high switching frequency reduces the size of external
components.
The MAX8520 and MAX8521 operate from a single supply
and bias the TEC between the outputs of two synchro-
nous buck regulators. This operation allows for temper-
ature control without “dead zones” or other nonlinearities
at low current. This arrangement ensures that the control
system does not hunt when the set point is very close to
the natural operating point, requiring a small amount of
heating or cooling. An analog control signal precisely
sets the TEC current.
Both devices feature accurate, individually adjustable
heating current limit and cooling current limit, along
with maximum TEC voltage limit to improve the reliability
of optical modules. An analog output signal monitors
the TEC current. A unique ripple cancellation scheme
helps reduce noise.
The MAX8520 is available in a 5mm x 5mm thin QFN
package and its switching frequency is adjustable up to
1MHz through an external resistor. The MAX8521 is also
available in a 5mm x 5mm thin QFN, as well as a space-
saving 3mm x 3mm UCSP, with a pin-selectable
switching frequency of 500kHz or 1MHz.
Applications
SFF/SFP Modules
Fiber-Optic Laser Modules
Fiber-Optic Network Equipment
ATE
Biotech Lab Equipment
Features
o
Circuit Footprint of 0.31in
2
o
Low-Profile Design
o
On-Chip Power MOSFETs
o
High-Efficiency Switch-Mode Design
o
Ripple Cancellation for Low Noise
o
Direct Current Control Prevents TEC Current
Surges
o
5% Accurate Adjustable Heating/Cooling Current
Limits
o
2% Accurate TEC Voltage Limit
o
No Dead Zone or Hunting at Low Output Current
o
ITEC Monitors TEC Current
o
1% Accurate Voltage Reference
o
Switching Frequency Up to 1MHz
o
Synchronization (MAX8521)
M
Smallest TEC Power Drivers for
Optical Modules
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
19-2586; Rev 0; 10/02
E
A
PART
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
20 Thin
QFN 5mm x 5mm
36 UCSP 3mm x 3mm
20 Thin QFN 5mm x 5mm
MAX8520
ETP
MAX8521
EBX
MAX8521ETP
UCSP is a trademark of Maxim Integrated Products, Inc.
INPUT
3V TO 5.5V
V
DD
PV
DD
FREQ
COMP
GND
SHDN
ITEC
ON
OFF
TEC CURRENT
MONITOR
CURRENT-
CONTROL
SIGNAL
CTLI
LX1
PGND1
CS
OS1
OS2
LX2
PGND2
TEC
I
TEC
=
±
1.5A
REF
ANALOG /DIGITAL
TEMPERATURE CONTROL
OUTPUT
MAX8521
Typical Operating Circuit
Pin Configurations appear at end of data sheet.
3mm x 3mm
CSP
5mm x 5mm
QFN
相關PDF資料 |
PDF描述 |
|---|---|
| MAX8521EBX | Triple 3-Input Positive-NAND Gates 14-CDIP -55 to 125 |
| MAX8521ETP | Triple 3-Input Positive-NAND Gates 14-CFP -55 to 125 |
| MAX8544EEP | Step-Down Controllers with Prebias Startup, Lossless Sensing, Synchronization, and OVP |
| MAX8543-MAX8544 | Step-Down Controllers with Prebias Startup, Lossless Sensing, Synchronization, and OVP |
| MAX8543EEE | Step-Down Controllers with Prebias Startup, Lossless Sensing, Synchronization, and OVP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX8521EBX | 制造商:Maxim Integrated Products 功能描述:SMALLEST TEC POWER DRIVERS FOR OPTICAL MODULE - Rail/Tube |
| MAX8521EBX+T | 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| MAX8521EBX-T | 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| MAX8521ETP | 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| MAX8521ETP+ | 功能描述:其他電源管理 TEC Power Driver for Optical Modules RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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