BQ25895_16 Datasheet, PDF (6/67 Pages) Texas Instruments – Adjustable Voltage 3.1-A Boost Operation

bq25895
SLUSC88A – MARCH 2015 – REVISED MAY 2016
www.ti.com
7.4 Thermal Information
THERMAL METRIC⁽¹⁾
bq25895
RTW (WQFN)
UNIT
24-PINS
R_θJA
R_θJC((op)
R_θJB
ψ_JT
ψ_JB
R_θJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
32.2
°C/W
34.8
°C/W
8.8
°C/W
0.5
°C/W
8.8
°C/W
2.0
°C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
7.5 Electrical Characteristics
V_{VBUS_UVLOZ} < V_VBUS < V_ACOV and V_VBUS > V_BAT > V_SLEEP, T_J = –40°C to +125°C and T_J = 25°C for typical values (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
QUIESCENT CURRENTS
V_BAT = 4.2 V, V_(VBUS) < V_(UVLO),
leakage between BAT and VBUS
5 µA
I_BAT
I_{(VBUS_HIZ)}
Battery discharge current (BAT, SW, SYS) in
buck mode
Input supply current (VBUS) in buck mode
when High-Z mode is enabled
High-Z mode, no VBUS, BATFET
disabled (REG09[5]=1), battery
monitor disabled, T_J < 85°C
High-Z mode, no VBUS, BATFET
enabled (REG09[5]=0), battery
monitor disabled, T_J < 85°C
V_(VBUS)= 5 V, High-Z mode, no
battery, battery monitor disabled
V_(VBUS)= 12 V, High-Z mode, no
battery, battery monitor disabled
12
23 µA
32
60 µA
15
35 µA
25
50 µA
V_BUS > V_(UVLO), V_BUS > V_BAT,
converter not switching
1.5
3 mA
I_(VBUS)
I_(BOOST)
Input supply current (V_BUS) in buck mode
Battery discharge current in boost mode
V_BUS > V_(UVLO), V_BUS > V_BAT,
converter switching, V_BAT = 3.2
V, I_SYS = 0A
V_BUS > V_(UVLO), V_BUS > V_BAT,
converter switching, V_BAT = 3.8
V, I_SYS = 0 A
V_BAT = 4.2 V, boost mode,
I_(VBUS)= 0 A, converter switching
3
mA
3
mA
5
mA
6
Submit Documentation Feedback
Product Folder Links: bq25895
Copyright © 2015–2016, Texas Instruments Incorporated