参数资料
型号: PS501-I/SS
厂商: Microchip Technology
文件页数: 36/42页
文件大小: 0K
描述: IC FIELD REPROG BATT MGR 28SSOP
标准包装: 47
功能: 充电管理
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 5.6 V ~ 18 V
工作温度: -20°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
供应商设备封装: 28-SSOP
包装: 管件
PS501
TABLE 10-3:
AC CHARACTERISTICS (T A = -20°C TO +85°C; V REG (INTERNAL) = +3.3V ± 10%)
Symbol
f RC
f AD
t CONV
Characteristic
Internal RC Oscillator Frequency
Internal A/D Clock Frequency
A/D Conversion Measurement Time, n-bit + sign
Min
Typ
512.000
f RC /16
2 n /f AD
Max
Units
kHz
kHz
ms
Condition
TABLE 10-4:
AC CHARACTERISTICS – SMBus (T A = -20°C TO +85°C;
V REG (INTERNAL) = +3.3V ± 10%)
Symbol
f SMB
f SMB - MAS
t BUF
Characteristic
SMBus Clock Operating Frequency
SMBus Clock Operating Frequency
Bus Free Time between START and
Min
<1.0
50
4.7
Typ
f RC /8
Max
100
68
Units
kHz
kHz
μ s
Condition
Slave mode
Master mode (Note 1)
STOP
t SHLD
t SU : STA
t SU : STOP
t HLD
t SETUP
Bus Hold Time after Repeated START
Setup Time before Repeated START
STOP Setup Time
Data Hold Time
Data Setup Time
4.0
4.7
4.0
300
250
μ s
μ s
μ s
μ s
μ s
t TIMEOUT
t LOW
t HIGH
t LOW : SEXT
t LOW : MEXT
t F
t R
Clock Low Time-out Period
Clock Low Period
Clock High Period
Message Buffering Time
Message Buffering Time
Clock/Data Fall Time
Clock/Data Rise Time
10
4.7
4.0
35
50
10
10
300
1000
ms
μ s
μ s
ms
ms
ns
ns
(Note 2)
(Note 3)
(Note 4)
(Note 5)
(Note 6)
(Note 6)
Note 1:
2:
3:
4:
5:
6:
Used when broadcasting AlarmWarning , ChargingCurrent and/or ChargingVoltage values to either a
SMBus Host or a SMBus Smart Battery Charger. This is only used when the PS501 becomes a SMBus
master for these functions. The receiving (slave) device may slow the transfer frequency. See SMBus
Tutorial in P4 User ’s Guide for additional information.
The PS501 will time-out when the cumulative message time defined from Start-to-Ack, Ack-to-Ack or
Ack-to-Stop exceeds the value of t TIMEOUT , min. of 25 ms. The PS501 will reset the communication no
later than t TIMEOUT , max. of 35 ms.
t HIGH max. provides a simple method for devices to detect bus idle conditions.
t LOW : SEXT is the cumulative time a slave device is allowed to extend the clock cycles in one message
from the initial start to the stop.
t LOW : MEXT is the cumulative time a master device is allowed to extend its clock cycles within each byte of
a message as defined from Start-to-Ack, Ack-to-Ack or Ack-to-Stop.
Rise and fall time is defined as follows:
t R = (V IL MAX -0.15) to (V IH MIN +0.15)
t F = 0.9 V DD to (V IL MAX -0.15)
DS21818C-page 36
? 2004 Microchip Technology Inc.
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