TEA1104

更新时间： 2024-01-24 07:54:21

品牌	Logo	应用领域
恩智浦 - NXP		电池
页数	文件大小	规格书
16页	123K
描述
Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers

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中文翻译

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技术参数
数据手册

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TEA1104 技术参数

生命周期：	Obsolete	包装说明：	SOP,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.71
可调阈值：	NO	模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-PDSO-G8	长度：	4.9 mm
信道数量：	2	功能数量：	1
端子数量：	8	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	认证状态：	Not Qualified
座面最大高度：	1.75 mm	最大供电电压 (Vsup)：	11.5 V
最小供电电压 (Vsup)：	5.45 V	表面贴装：	YES
技术：	BICMOS	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
宽度：	3.9 mm	Base Number Matches：	1

TEA1104 数据手册

Philips Semiconductors

Objective speciﬁcation

Cost effective battery monitor and fast

charge IC for NiCd and NiMH chargers

TEA1104; TEA1104T

• The battery voltage is sensed each ‘cycle time’. The

Open battery protection

cycle time is defined as:

When the rechargeable battery is removed, the output

voltage V_batwill rise to a high level. The ‘open battery

protection’ block will detect this voltage and the charge

current will be switched off. A digital filter prevents false

open battery protection. The open battery signal

(V_bat> 3.6 V) must be present for a duration of at least

4 clock pulses.

– T_cycle= 2 exp16 × t_osc

• The ‘inhibit time’ is the time that the charger current is

disabled, after which the battery voltage is sensed in a

currentless way.

– t_inhibit= 10 × t_osc

Battery sampling takes one oscillator period for each

cycle interval.

Battery monitor

– t_sample= t_osc

One or two cell packs can be connected directly to V_bat

(battery connection) without an external resistor divider. At

larger cell packs the battery voltage must be scaled down

to a voltage range of 0.81 to 3.6 V. It is also possible to

take a tap on the chain of batteries. Battery full is

recognized by voltage peak detection (V_peak), meaning a

decrease of 0.25% (typ.) with respect to the top value.

Keeping in mind a battery voltage range of 0.81 to 3.6 V

and an accuracy of 10% at V_bat= 2.4 V for battery full

detection, means that the internal ADC has to be 13 bits.

Several filters are included to prevent false full detection.

The series resistance of the battery and battery connection

can cause battery voltage fluctuations and therefore it is

necessary to stop the charging before sensing; this is

called the ‘inhibit time’. This will be performed

• The ‘disable time’ is present to correct start-up with flat

or polarized batteries. During the disable time, the

battery full detection is not active.

– t_disable= 2 exp −5 × time-out

The timer is reset by battery full detection, but is on hold

during the temperature and battery-low protection modes.

Temperature protection block

Temperature sensing is achieved by using a cheap

thermistor. Two temperature windows are built in:

• If the temperature at power-on reset is above the

maximum temperature protection level, the trickle

charge current is active. The same applies for

temperatures below the minimum temperature. Fast

charging starts when the temperature is in between the

minimum and the maximum temperature levels.

automatically via the regulation output pin LED. The

charging is stopped for ten oscillator periods at the end of

which sampling is performed. The battery voltage will now

be sensed in a currentless way.

• If the temperature is between the maximum and

minimum temperature at power-on reset, the fast charge

current level is active. If the temperature sinks below the

minimum temperature level, again the trickle charge

level is active. At rising temperature, the fast charge

current is latched off at the ‘cut off’ temperature level.

Timer/oscillator

The oscillator has a sawtooth shape.

The period time is defined by: t_osc= K × R_ref× C_osc

The oscillator frequency is used in the timer block. In this

block several important signals are created.

To avoid switching on and off with temperature, a

hysteresis is built in for low temperature level. If the

temperature protection is not necessary, pin ‘Negative

Temperature Coefficient resistor’ (NTC) must be

connected to pin R_ref.

• Time-out for protecting the fast charge process in time.

Time-out is normally chosen to be 25% longer than the

associated fast charge time. So for a one hour charge

time, time-out = 1.25 hours. The relationship with the

oscillator period time is:

Battery low protections

– Time-out = 2 exp28 × t_osc

When the battery voltage is less than 0.81 V, the circuit

assumes that there are short circuited batteries and the

charge current is reduced to the trickle charge level. If the

batteries are flat, the trickle charge current is able to raise

the battery voltage within an acceptable period of time,

after which fast charging starts.

• The duty factor in the trickle charge mode: The duty

factor is fixed to ¹⁄₄₀, meaning that the average:

– I_trickle= ¹⁄₄₀× I_fast

– t_on= ³⁄₄× 2 exp9 × t_osc

– t_off= 2 exp14 × t_osc

1996 Feb 26

1 2 3 456 7 8...16

中文翻译

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与TEA1104相关器件

型号	品牌	获取价格	描述	数据表
TEA1104P	NXP	获取价格	暂无描述
TEA1104T	NXP	获取价格	Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers
TEA1104TD-T	ETC	获取价格	Battery Management
TEA1104T-T	NXP	获取价格	IC 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, Power Management Circuit
TEA1110	NXP	获取价格	Low voltage versatile telephone transmission circuit with dialler interface
TEA1110A	NXP	获取价格	Low voltage versatile telephone transmission circuit with dialler interface
TEA1110A	UTC	获取价格	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION TELEPHONE TRANSMISSION INTERFACE
TEA1110A(14DIP)	UTC	获取价格	Telephone Circuit, Bipolar, PDIP14
TEA1110A(14SOP)	UTC	获取价格	Telephone Circuit, Bipolar, PDSO14
TEA1110A_10	UTC	获取价格	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

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