SAA1501T Datasheet, PDF (16/20 Pages) NXP Semiconductors – Battery charge level indicator

Philips Semiconductors
Battery charge level indicator
Objective specification
SAA1501T
TIMING CHARACTERISTICS
SYMBOL
T_osc
T_clk
t_som
t_som(p)
t_rec
t_self
t_battery(s)
t_battery(p)
t_su
t_id
t_pd
t_su:LED
t_LED(ON)
f_BP
f_BUZ
PARAMETER
CONDITIONS
oscillator cycle time
note 1
clock cycle time
sense operation mode time
note 2
sense operation mode period
time
note 2
recognition time
power; note 3
load; note 4
self discharge counter time
battery temperature
measurement sense time
T_battery > T_self
(100 days at f_osc = 4 kHz)
T_battery > T_self
(200 days at f_osc = 4 kHz)
battery temperature
measurement period time
display test set-up time
interval display test time
period display test time
LED set-up time
LEDs-on time
after change of mode
(except POCH mode)
drive voltage frequency for back
plane
modulation frequency for auto
buzzer
Notes
1. t_osc = 2C_osc × ^V-I--_r--^oe---^sf-₃-^c- ; where V_osc = 440 mV and I_ref3 = 0.75.
2. Applies to all converters and enable signal.
3. For charge current AC or DC: f > ¹â„₂f_osc.
4. For discharge current AC: f > ¹â„₄f_osc.
VALUE
T_osc = 2C_osc × V_osc/I_ref3
64t_osc
1.5 × 2⁷T_osc
2¹²T_osc
>32t_osc
>20t_osc
2³⁵T_osc
2³⁶T_osc
2⁷T_osc
2¹⁶T_osc
2¹¹T_osc < t < 1.5 × 2¹⁸T_osc
2¹⁰T_osc
1.5 × 2¹⁸T_osc
2⁹T_osc
2¹⁵T_osc
2^−4T_osc
1_⁄2Tosc
December 1994
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