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参数资料
| 型号： | MAX8688BHETG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/38页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY CTRLR/MONTR 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 电源控制器/监控器 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 6.7mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
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Digital Power-Supply Controller/Monitor
with PMBus Interface
Sending a DIRECT Format Value
To send a value, the host must use the equation below
to solve for Y:
Fault Management and Reporting
For reporting faults/warnings to the host on a real-time
basis, the MAX8688 asserts the open-drain FLT pin and
where:
Y = (mX + b) x 10 R
sets the appropriate bit in the STATUS_BYTE and
MFR_FAULT_STATUS registers, respectively. On
recognition of the FLT assertion, the host or system
Y is the 2-byte, two’s complement integer to be sent
to the unit;
m, the slope coefficient, is the 2-byte, two’s comple-
ment integer;
X is a real world value, in units such as amperes or
volts, to be converted for transmission;
b, the offset, is the 2-byte, two’s complement integer;
and
R, the exponent, is the decimal value equivalent to
the 1-byte, two’s complement integer.
The following example demonstrates how the host can
send and retrieve values from the MAX8688.
From Table 4, the coefficients used in the following
parameters are:
VOUT_COMMAND: m = 19995, b = 0, R = -1
READ_VOUT: m = 19995, b = 0, R = -1
If a host wants to request the POL to output a voltage of
3.0V, the corresponding VOUT_COMMAND value is:
Y = (mX + b) x 10 R
Y = (19995 x 3.0 + 0) x 10 -1 = 5998.5 (decimal)
= 176Eh (hex)
Conversely, if the host received a value of 176Eh on a
READ_VOUT command, this is equivalent to:
manager is expected to poll multiple MAX8688s and
retrieves fault/warning information. The Manufacturer
Fault Status Register, MFR_FAULT_STATUS, provides
more detailed information on fault/warning. Faults/warn-
ings are cleared when any one of the following condi-
tions occurs:
? A CLEAR_FAULTS command is received.
? ENOUT is commanded through the OPERATION
command or A3/ONOFF to turn off and then turn
on.
? A RST signal is asserted for longer than t RST where
the MAX8688 is internally reset.
? Bias power to the MAX8688 is removed and then
reapplied.
The MAX8688 responds to fault conditions according to
the Manufacturer Fault Response command
(MFR_FAULT_RESPONSE). This command byte deter-
mines how the MAX8688 should respond to each par-
ticular fault.
In addition, the MAX8688 responds to the following
error conditions.
1) If the internal reference fails to operate, FLT is
asserted. To clear this fault, the MAX8688 has to go
through a device reset.
2) The MAX8688 responds to unsupported commands
X =
1
m
(
Y × 10 ? R ? b
)
with a NACK.
3) When the host sends insufficient data (too few
bytes), the MAX8688 sets the CML bit and asserts
1 (176Eh x 10 -(-1) - 0)
X=
19995
= 59980/19995 = 2.999750
which is within 0.0083% of 3.0V.
Power supplies and power converters generally have no
way of knowing how their outputs are connected to
ground. Within the power supply, all output voltages are
most commonly treated as positive. Accordingly, all out-
put voltages and output voltage-related parameters of
PMBus devices are commanded and reported as posi-
tive values. It is up to the system to know that a particu-
lar output is negative, if that is of interest to the system.
All output voltage-related commands use 2 data bytes.
FLT .
4) When the host sends too much data (too many
bytes), the MAX8688 sets the CML bit and asserts
FLT .
When a read request is issued to a write-only com-
mand, the read operation is aborted and no warning is
issued.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8688BHETG+ | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8688BHETG+T | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8688BLETG+ | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8688BLETG+T | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8688EVKIT+ | 功能描述:电流和电力监控器、调节器 DIGITAL POWER SUPPLY RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
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