F e a t u r e s
Pret Charge Voltage with ±1% Accuracy Input Voltage: >8.9V
Ideal for Dual-Cell（8.4V）Li-Ion Batteries Pre-Charging, the Charge Current is adjustable
Constant -Current Charging, the Charge Current is adjustable
Constant-Voltage Charging
Constant-Current/Constant-Voltage
Charging with Temperature Monitoring
Automatic Recharge
Double LEDs Charge Status Indication
Available in SOP-8L Package
A p p l i c a t i o n s
Charger for Li-Ion Coin Cell Batteries
Portable MP3 Players, Wireless Headts Bluetooth Applications D e s c r i p t i o n
The DHK6038 is a highly advanced complete constant-current/ constant voltage linear charger for cell lithium-ion batteries. Its package and low external component count make the HDHK6038 ideally suited for portable applications. The charge current can be programmed externally with a single resistor, which may be programmed up to 1A. DHK6038 determines the charge mode by detecting the battery voltage: Pre-charge, constant current charging, constant voltage charging. The charge current of
0pre-charging and constant –current charging is adjustable. The DHK6038 is monitored by temperat
ure monitor during the constant-current and constant-voltage charging. There are two LEDs indicate the charge mode.
The DHK6038 charger converters are available in the SOP-8L packages (or upon request).
Multifunction Wristwatches
T y p i c a l A p p l i c a t i o n
Figure 1
P i n A s s i g n m e n t
SOP-8L
Absolute Maximum Ratings
Input Supply Voltage (VIN) ..................................................................... ................... –0.3V to 18V TS、CHRG、CS .......................................................... ........... – 0.3V to VIN + 0.3V Maximum Junction Temperature .............................................................................................. 125℃ Operating Ambient –40℃to 85℃ Storage Temperature Range …………………………………………….................. –65 ℃to 125℃
PIN NUMBER
SOP-8L
PIN NAME DESCRIPTION
1 VIN Positive Input Supply Voltage.
2 TS Temperature Sen
3 CHRG三国演义书籍
Open-Drain Charge Status
Output
4 GND Ground
5 VOUT
Charge Current Output
6 EN ON/OFF Control （High Enable）
7 CS Charge Current Program
8 BAT Battery Connection
VOUT
Lead Temperature (Soldering, 10 c)..................................................................................... 300℃E l e c t r i c a l C h a r a c t e r i s t i c s
Operating Conditions: T A=25℃.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I VIN Input Supply
Current
0.15 0.7 1.1 mA
I SLEEP VIN Sleep Current VIN=7V VOUT=8V 7.8 µA
I IV(VOUT)Input bias current
on VOUT pin
VOUT=8.4V 10 65 µA
Battery Voltage Regulation Constant-current Charge
水果捞怎么做V O(REG)Output voltage 8.317 8.4 8.484 V
V（CS）Current regulation
threshold
Voltage at pin CS , relative
to VIN
180 200 220 mV
Precharge Comparatorcfg桩施工工艺
V(min)Precharge threshold 5.6 6 6.2 V Precharge Current Regulation
Voltage at pin CS, relative to VIN, R SET =1Ω.18 mA
I(PRECHG)Precharge current
十周岁
regulation Voltage at pin CS, relative水煮蛋怎么煮
tafeto VIN, R SET =1Ω.，VIN=9V
10 35 mA
V RCH comparator（Battery Recharge Threshold）一级运算
V（RCH）Recharge threshold V O(REG)
-400m
V
V
CHRG Pin
V OL(CHRG)Output（low）voltage I OL =10mA 1.5 V V OH(CHRG)Output（high）voltage I OH =5mA VIN-2 V
A p p l i c a t i o n I n f o r m a t i o n
Functional Description
The DHK6038 is an advanced 1A linear charge controller for two-cell Li-Ion of Li-Pol applications. Refer to Blocking Diagram (Figure 2) and Operation Flow Chart (Figure 3) in this ction.
Figure 2: Blocking Diagram
Figure 3: Operation Flow Chart
Qualification and Precharge
When power is applied, the DHK6038 starts a charge-cycle i f a battery is already prent or when a battery is inrted. Charge qualification is bad on battery temperature and voltage.
The DHK6038 suspends charge if the battery temperature is outside the V TS1 to V TS2 range and suspends charge until the battery temperature is within the allowed range. The DHK6038 also checks the battery voltage. If the battery voltage is below the precharge threshold V(min) , the DHK6038 us precharge to condition the battery. The conditioning charge rate I(PRECHG) is t at approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of charge. See Figure 4 for a typical charge-profile.
Figure 4: Typical Charge Profile
Current Regulation Pha
小朋友流鼻血The DHK6038 regulates current while the battery-pack vol tage is less than the regulation voltage, V O(REG). The DHK6038 monitors charge current at the CS input by t he voltage drop across a n-resistor, R SET, in ries with the battery pack. In current nsing configuration, R SET is bet
ween the VIN and CS pins, charge-current feedback, applied through pin CS, maintains a voltage of V CS across the current n resistor. The following formula calculates the value of the Sen resistor:
Where I REG is the desired charging current.
Voltage Pha
The voltage regulation feedback is through the BAT pin. This input is tied directly to the positive side of the battery pack. The DHK6038 monitors the battery-pa ck voltage between the BAT and GND pins. The DHK6038 is offered 8.4V output voltage.
