LB11851TT [SANYO]
Microprocessor Fan Motor Interface Driver; 微处理器风扇电机驱动器的接口
| 型号： | LB11851TT |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Microprocessor Fan Motor Interface Driver |
| 文件： | 总5页 (文件大小：180K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA1634
Monolithic Digital IC
Microprocessor Fan Motor
Interface Driver
LB11851TT
Overview
The LB11851TT provides an interface between a microcontroller motor control signal and external MOS transistors. This
device can implement a microprocessor fan driver with a minimal number of external components. The LB11851TT is
optimal for server and personal computer microprocessor fan drive in response to temperature or other external signals
when high precision and high air flow are required.
Features
• Fan motor interface driver function (FGIN)
⇒ This IC accepts a signal from a microcontroller and interfaces to external power transistors (PMOS and NMOS) to
provide high-efficiency low-power single-phase full-wave drive.
• Variable speed input pin (PWMIN)
⇒ PMOS side PWM control
NMOS side current regeneration using slow decay is used to achieve quite high-speed control.
• Built-in kickback absorption circuit (OUT1P/2P)
⇒ This circuit absorbs the kickback current that is generated at phase switching or power on/off to achieve smooth
current regeneration and protect the external transistors against destruction or degradation.
• Built-in current limiter circuit (SENSE)
⇒ This circuit implements a chopper-type current limiting control that operates at startup and during lock protection
mode.
The current detection voltage is set to a fixed 0.2V internally.
• Built-in microcontroller power supply (5VREG)
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
's products or
equipment.
D2409 SY 20091221-S00006 No.A1634-1/5
LB11851TT
Specifications
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Maximum supply voltage
V
max
18
20
CC
OUTN pin maximum output current
OUTP pin maximum output current
OUT pin voltage handling capacity
5VREG maximum output current
Allowable power dissipation
IOUTN max
mA
mA
V
IOUTP max
VOUT max
I5VREG max
Pd max
20
18
20
mA
mW
When mounted on the specified circuit
400
board *1
*2
Operating temperature
Storage temperature
Topr
Tstg
-40 to +90
°C
°C
-55 to +150
*1 Specified substrate :20.0mm ×10.0mm ×0.8mm, Paper phenol board.
*2 Do not exceed Tj max = 150°C
Recommended Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Supply voltage - V
V
6 to 16
2.1 to 5.0
0 to 0.4
CC
CC
PWM high-level input voltage range
VPWMINH
VPWMINL
VFGINH
VFGINL
V
PWM low-level input voltage range
FGIN high-level input voltage range
FGIN low-level input voltage range
SENSE input voltage range
V
2.1 to 5.0
0 to 0.3
V
V
VSENop
0 to 5.0
V
Electrical Characteristics at Ta = 25°C, V
DD
= 12V
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
3.5
max
6.5
Circuit current
I
1
With no load
5VREG = 10mA
5
mA
V
CC
5VREG voltage
5VREG
VSENth
FGIhi
4.8
0.15
60
5
0.19
80
5.2
SENSE pin detection voltage
FGIN high-level input current
FGIN low-level input current
PWMIN high-level current
PWMIN low-level current
0.23
100
-15
55
V
V
V
V
V
I
= 3V
= 0V
= 3V
= 0V
μA
μA
μA
μA
V
IN
IN
IN
IN
FGIlow
PWMIhi
PWMIlow
-27
35
-21
45
-27
10
-21
11
-14
11.9
OUT1P, OUT2P high-level output
voltage
V
12PH
= 10mA *2
= 1mA *2
= 10mA *2
= 1mA *2
= 10mA *1
= 1mA *1
= 10mA *1
= 1mA *1
O
O
I
I
I
I
I
I
I
11
11.3
4
V
O
O
O
O
O
O
O
OUT1P, OUT2P low-level output
voltage
V
12PL
3
5
1.5
V
O
1.2
10
V
OUT1N, OUT2N high-level output
voltage
V
12NH
9
10.8
0.1
11.9
V
O
11.1
1
V
OUT1N, OUT2N low-level output
voltage
V
12NL
2
1
V
O
0.7
V
*1 : There is a built-in 100Ω gate protection resistor.
*2 : There is a built-in 300Ω gate protection resistor.
Truth Table
FGIN
PWMIN
SENSE
L
OUT1P
OUT1N
OUT2P
OUT2N
Mode
L
H
L
L
L
L
H
L
H
L
H
L
OUT1 → 2 drive
OUT2 → 1 drive
H
H
H
H
H
H
L
L
H
H
H
H
H
L
Regeneration mode
(low side regeneration)
H
L
H
L
H
H
L
Current limiter
(low side regeneration)
H
H
Note 1 : For the SENSE pin, the "H" state is 0.2V or higher.
Note 2 : The IC goes to regeneration mode (no motor drive applied) when the microcontroller is reset (the output high-impedance state).
Package Dimensions
Pin Assignment
No.A1634-2/5
LB11851TT
unit : mm (typ)
3297
OUT2P
1
2
3
4
5
10 OUT1P
3.0
OUT2N
5VREG
FGIN
9
8
7
6
OUT1N
6
10
V
LB11851TT
CC
SENSE
GND
PWMIN
1
5
Top View
(0.5)
0.5
0.2
0.125
Pd max -- Ta
0.5
0.4
0.3
0.2
0.1
0
Specified Substrate : 20.0 10.0 0.8mm3
×
×
Paper phenol
SANYO : MSOP10(150mil)
0.19
100
-20
20
40
-40
0
80
120
60
Ambient temperature, Ta - C
Block Diagram
V
CC
OUT1N
OUT1P
5VREG
20kΩ
300Ω
5VREG
100Ω
20kΩ
5VREG
Controller
PWMIN
FGIN
5VREG
OUT2N
OUT2P
20kΩ
300Ω
100Ω
20kΩ
SENSE
GND
No.A1634-3/5
LB11851TT
Application Circuit Example (12V)
V
=Line
M
1P
1N
2P
2N
RF
V
CC
5VREG
SENSE
V
DD
OUT2P
OUT2N
2P
2N
PWMOUT
FGOUT
PWMIN
FGIN
-
H
IN
+
IN
Microcontroller
OUT1P
OUT1N
1P
1N
PWMIN
INPUT
A/D
GND
V
SS
FG
No.A1634-4/5
LB11851TT
1. Power supply (V
and V ) and ground
M
CC
The wiring is separated into the control IC side (V
line) and the motor output side (V line) by the diode DI, which
CC
M
protects the IC from destruction on reverse connection. The application circuit uses 1μF capacitors to prevent line
oscillation when kickback occurs. Similarly, 1μF capacitors are also used on the V
stabilization.
line for power supply line
CC
2. PWMIN
The LB11851M accepts an open-drain output signal from the microcontroller with this pin and controls the on/off
states of the PMOS transistor (OUT1P and OUT2P) outputs accordingly. A constant-current bias is provided from
5VREG internally to the IC.
3. FGIN
The LB11851M accepts a CMOS output from the microcontroller with this pin and determines the drive phase output
(OUT1P, OUT2P, OUT1N, or OUT2N).
4. 5VREG
This is the power supply for the microcontroller, Hall effect sensors, and other circuits. A capacitor with a value of
1μF is used for output stabilization. This pin has an output current capacity of 20mA.
5. SENSE
A sensing resistor is used for current detection. If the SENSE pin voltage exceeds 0.2V, the PMOS transistors are
turned off and only low side regeneration is performed.
*<OUT1, 2P output H voltage / OUT1, 2N output L voltage>
Output L voltage of OUT1 and 2 sticks in GND when FET is put up outside like the example of applied circuit by
internal pull-down resistor (20KΩ), and there is no what turns on FET.
Output H voltage of OUT1 and 2 sticks in VCC with internal pull-up resistor (20kΩ) as the Pch side is also similar.
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products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
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SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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above.
This catalog provides information as of December, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1634-5/5
相关型号：
LB11852FV
Monolithic Digital IC For Fan Motor Single-phase Full-wave Pre-driver with Speed Control Function
SANYO
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