參數(shù)資料
型號(hào)： TWL2214CA
英文描述： High voltage fast-switching NPN power transistor
中文描述： 電源管理IC和鋰離子電池充電控制
文件頁(yè)數(shù)： 9/36頁(yè)
文件大小： 511K
代理商： TWL2214CA
SLVS321A
–
OCTOBER 2001
–
REVISED JANUARY 2002
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
VREG1
XRST
PSH
CD1
CD2
To keep power-on condition PSH must be
high within maximum CD2 delay.
CD1 delay
0.9 VOUT
Hysteresis
Figure 4. V
REG1
Monitoring of Reset Control
regulator 1
This regulator is automatically enabled after the power-on process is complete. It stays enabled until the
power-off condition occurs. Regulator 1 supplies power to the microprocessor. The nominal output voltage is
2.8 V and the maximum output current is 150 mA. Regulator 1 requires an output capacitor in the range of 4.7
μ
F
to10
μ
F with an ESR less than 6
.
regulator 6
This regulator output voltage can be enabled by I
2
C by attaching CONT (terminal 21 or H6) to V
DD
. Attaching
CONT to GND makes this regulator automatically enabled with power on. The output voltage is programmed
by I
2
C. The maximum output current of 100 mA requires an output capacitor in range of 4.7
μ
F to 10
μ
F, with
ESR in the range of 1
to
6
.
The output voltage ranges from 2.5 V to 3 V.
regulators 2, 3, 4, and 5
Regulators 2, 3, 4, and 5 are output voltages programmed and enabled by I
2
C. The output voltage ranges from
2.3 V to 3 V in 100-mV steps. The maximum output current for regulators 2 and 3 is 80 mA, for regulator 4 it
is 120 mA, and for regulator 5 it is 150 mA. The default output voltage for all regulators is 3 V. These regulators
have very low output noise (maximum 30
μ
V
RMS
); they are suitable for powering up the RF block, which requires
an output capacitor in the range of 4.7
μ
F to 10
μ
F with an ESR less than 6
.
vibrator driver
The TWL2214CA device has incorporated a vibrator driver with selectable output voltage and current. This
integrated vibrator driver has the same features as the other LDO regulators. The vibrator is enabled by I
2
C.
The output voltage can be selected by tying SEL (terminal 4 or D2) to V
DD
or GND. If SEL is tied to V
, the
output voltage is set to 3 V. If SEL is tied to GND, the output voltage is set to 1.3 V.
LED driver
The TWL2214CA device provides the capability of driving three LEDs. These drivers, enabled by I
2
C, can drive
currents of 160 mA, 20 mA, and 10 mA individually with a maximum voltage drop of 0.8 V.
ringer driver
The TWL2214CA device provides the capability of driving a ringer. It is enabled by I
2
C and uses an N-channel
FET with a maximum resistance of 3
.
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